{"title":"Astrophotography Filters","description":"Astrophotography filters for deep sky, planetary and narrowband imaging. Explore LRGB, SHO, dual narrowband and other filters for different imaging targets and setups.","products":[{"product_id":"lrgb-filters","title":"LRGB 36mm フィルター","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/IMG-4507.jpg?v=1734088195\" style=\"width: 100%; height: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003eLRGB フィルターは、モノラル カメラでカラー画像を取得するために不可欠なアクセサリです。ターゲット領域のコントラストを向上させ、細部とレイヤーを強調表示できます。\u003cbr\u003eToupTek Astro 36mm LRGB フィルターは 95% の高い透過率を持ち、豊富なスペクトル範囲をカバーします。 RGB 3 チャンネルの露光と合成後により、カラーバランスの取れたリアルで自然なディープスカイシーンを明らかにすることができます。\u003c\/p\u003e\n\u003cp\u003e\u003cimg title=\"LRGB 36mm Filters\" alt=\"LRGB 36mm フィルター\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/NM.jpg\" style=\"width: 100%; height: auto;\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eLフィルターは赤紫外カットフィルターとして機能し、420nm〜685nmの可視光を98%の高い透過率で通過させ、ターゲットのコントラストを高めます。\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg title=\"LRGB 36mm Filters\" alt=\"LRGB 36mm フィルター\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/L_filter1.jpg\" style=\"width: 100%; height: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003eRフィルターは590nmから700nmの赤色光の通過を許可し、H-αおよび[SII]放出の最大透過を維持します。\u003c\/p\u003e\n\u003cp\u003e\u003cimg title=\"LRGB 36mm Filters\" alt=\"LRGB 36mm フィルター\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/R_filter.jpg\" style=\"width: 100%; height: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003eG フィルターは 490nm ～ 580nm の光を通過させ、このスペクトル付近の水銀、ナトリウムなどの輝線を初めてカットします。\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/G_filter.jpg\" title=\"LRGB 36mm Filters\" alt=\"LRGB 36mm フィルター\" style=\"width: 100%; height: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003eB フィルターは 400nm ～ 510nm 帯域の光の透過を可能にし、486nm の H-ベータ線を含むターゲット (馬頭星雲など) をよりターゲットにします。\u003c\/p\u003e\n\u003cp\u003e\u003cimg title=\"LRGB 36mm Filters\" alt=\"LRGB 36mm フィルター\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/B_filter.jpg\" style=\"width: 100%; height: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e作品展示\u003c\/p\u003e\n\u003cp\u003eL シングル露出 300秒\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/L.jpg\" title=\"LRGB 36mm Filters\" alt=\"LRGB 36mm フィルター\" style=\"width: 100%; height: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003eR シングル露出 300秒\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/R.jpg\" title=\"LRGB 36mm Filters\" alt=\"LRGB 36mm フィルター\" style=\"width: 100%; height: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003eG シングル露出 300秒\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/G.jpg\" title=\"LRGB 36mm Filters\" alt=\"LRGB 36mm フィルター\" style=\"width: 100%; height: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003eB シングル露出 300秒\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/B.jpg\" title=\"LRGB 36mm Filters\" alt=\"LRGB 36mm フィルター\" style=\"width: 100%; height: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eターゲット:LBN777\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eフォトグラファー: voice\u0026 LiiiiiCo\u003cbr\u003e装置\u003cbr\u003e望遠鏡：アスキーワッチャー F3.4\u003cbr\u003eカメラ: ToupTek ATR2600M\u003cbr\u003eフィルター：ToupTek Astro 36mm LRGBフィルター\u003cbr\u003e累積曝露32時間\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/36MMLRGB.jpg?v=1740039566\" alt=\"\"\u003e\u003c\/p\u003e","brand":"ToupTek Astro","offers":[{"title":"LRGB 1.25\" Set","offer_id":50555778597176,"sku":"","price":116.0,"currency_code":"USD","in_stock":true},{"title":"LRGB 2\" Set","offer_id":50555778629944,"sku":"","price":215.0,"currency_code":"USD","in_stock":true},{"title":"LRGB 36mm Set","offer_id":50555778662712,"sku":"","price":161.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/LRGB_2_filter.jpg?v=1770945180"},{"product_id":"sho-filters","title":"SHO 36MM 狭帯域フィルター","description":"\u003cp\u003eToupTek 新しい狭帯域 36mm フィルター\u003c\/p\u003e\n\u003cp\u003eナローバンドフィルターは天体写真をより興味深いものにします。エミッション星雲は、深紅の656.28nm Hαエミッションライン、赤の[SII]（671.6nmおよび673.1nm）、青緑の[OIII]（500.7nmおよび495.9nm）など、豊かで複雑なナローバンドエミッションラインを含んでいます。 \u003cbr\u003e広帯域と比較して、狭帯域フィルターは少数の非常に狭い帯域のみに焦点を当て、数ナノメートルから十数ナノメートルの帯域幅のみを保持するため、この帯域内のターゲットの詳細な特徴をより正確かつ具体的に強調できます。\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/SHO_FILTER.jpg\" alt=\"SHO 36MMフィルター\" title=\"SHO 36MM Filters\"\u003e\u003c\/p\u003e\n\u003cp\u003eToupTek Astroの最新の36mm HSOフィルターには、中心波長656.3nmで帯域幅3.5nmのHαフィルター、中心波長671.6nmおよび500.7nmで帯域幅4nmの\u003cSII\u003eフィルターと\u003cOIII\u003eフィルターが含まれています。\u003cbr\u003eフィルターの光学濃度 (OD) 値は 5.0 と高く、他の干渉光を効果的にブロックできます。 5.0 を超える光学密度 (OD) は、フィルターが透過光を元の光の 1\/10^5 倍未満に弱め、画像精度を向上させ、深宇宙ターゲットのかすかな細部を強調できることを意味します。\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/sho_pro3.jpg?v=1725957177\" alt=\"SHO 36MMフィルター\" title=\"SHO 36MM Filters\"\u003e \u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/sho_pro4.jpg?v=1725957177\" alt=\"SHO 36MMフィルター\" title=\"SHO 36MM Filters\"\u003e\u003c\/p\u003e\n\u003cp\u003e光害がひどい環境では、[SII]、Hα、[OIII]などの狭帯域フィルターの組み合わせを使用することで、ある程度の光害や大気散乱に抵抗できるだけでなく、ハッブルの偽色で新しいイメージングの楽しさをもたらすことができます。\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e作品展示\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHa 単一露出 300秒\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/H_300S.jpg\" alt=\"SHO 36MMフィルター\" title=\"SHO 36MM Filters\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSII シングル露出 300 秒\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/S_300S.jpg\" alt=\"SHO 36MMフィルター\" title=\"SHO 36MM Filters\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOIII シングル露出 300秒\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/O_300S.jpg\" alt=\"SHO 36MMフィルター\" title=\"SHO 36MM Filters\"\u003e\u003c\/p\u003e\n\u003cp\u003e443 号\u003c\/p\u003e\n\u003cp\u003e撮影者：声 \u003cbr\u003e装置： \u003cbr\u003e望遠鏡: スカイウォッチャー F3.4\u003cbr\u003eカメラ: TR2600M+ATR2600C \u003c\/p\u003e\n\u003cp\u003eフィルター：ToupTek Astro 36mm SHO\u003c\/p\u003e\n\u003cp\u003e累積曝露20時間\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/36mmSHO_app.webp\" alt=\"SHO 36MMフィルター\" title=\"SHO 36MM Filters\"\u003e\u003c\/p\u003e\n\u003cp\u003eToupTek Astro LRGB SHO フィルターは平らに光学的に研磨され、傷つきにくいコーティングで覆われており、繰り返し洗浄できます。反射を軽減するために、フィルターのエッジの周囲を黒く加工し、フィルターのエッジからの反射光によって生じる迷光を効果的にブロックします。表面の低散乱設計により、光害をある程度遮断し、人工光源からの干渉や散乱現象を軽減することもできます。\u003c\/p\u003e","brand":"ToupTek Astro","offers":[{"title":"SHO 36mm Narrowband Filters-4nm \/ Hα Filter","offer_id":50556219982136,"sku":null,"price":165.0,"currency_code":"USD","in_stock":true},{"title":"SHO 36mm Narrowband Filters-4nm \/ SII Filter","offer_id":50556267397432,"sku":null,"price":165.0,"currency_code":"USD","in_stock":true},{"title":"SHO 36mm Narrowband Filters-4nm \/ OIII Filter","offer_id":50556267430200,"sku":null,"price":165.0,"currency_code":"USD","in_stock":true},{"title":"SHO 36mm Narrowband Filters-4nm \/ SHO Filters Set","offer_id":50556267462968,"sku":null,"price":431.0,"currency_code":"USD","in_stock":true},{"title":"SHO 1.25\" Narrowband Filters-6.5nm \/ Hα Filter","offer_id":49224244298040,"sku":"","price":165.0,"currency_code":"USD","in_stock":false},{"title":"SHO 1.25\" Narrowband Filters-6.5nm \/ SII Filter","offer_id":50556267200824,"sku":null,"price":165.0,"currency_code":"USD","in_stock":false},{"title":"SHO 1.25\" Narrowband Filters-6.5nm \/ OIII Filter","offer_id":50556267233592,"sku":null,"price":165.0,"currency_code":"USD","in_stock":false},{"title":"SHO 1.25\" Narrowband Filters-6.5nm \/ SHO Filters Set","offer_id":50556267266360,"sku":null,"price":260.0,"currency_code":"USD","in_stock":true},{"title":"SHO 2\" Narrowband Filters-6.5nm \/ Hα Filter","offer_id":50556219457848,"sku":null,"price":165.0,"currency_code":"USD","in_stock":true},{"title":"SHO 2\" Narrowband Filters-6.5nm \/ SII Filter","offer_id":50556267299128,"sku":null,"price":165.0,"currency_code":"USD","in_stock":true},{"title":"SHO 2\" Narrowband Filters-6.5nm \/ OIII Filter","offer_id":50556267331896,"sku":null,"price":165.0,"currency_code":"USD","in_stock":true},{"title":"SHO 2\" Narrowband Filters-6.5nm \/ SHO Filters Set","offer_id":50556267364664,"sku":null,"price":458.0,"currency_code":"USD","in_stock":true},{"title":"SHO 2\"Narrowband Filters-4nm \/ Hα Filter","offer_id":51751403847992,"sku":null,"price":192.0,"currency_code":"USD","in_stock":true},{"title":"SHO 2\"Narrowband Filters-4nm \/ SII Filter","offer_id":51751403880760,"sku":null,"price":192.0,"currency_code":"USD","in_stock":true},{"title":"SHO 2\"Narrowband Filters-4nm \/ OIII Filter","offer_id":51751403913528,"sku":null,"price":192.0,"currency_code":"USD","in_stock":true},{"title":"SHO 2\"Narrowband Filters-4nm \/ SHO Filters Set","offer_id":51751403946296,"sku":null,"price":539.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/SHO_36mm_filter.jpg?v=1773197034"},{"product_id":"sho-filters-4nm-2inch","title":"SHO Filters 4nm 2inch","description":"\u003cdiv style=\"background: linear-gradient(135deg,#0f0f1e 0,#1a1a3e 100%); padding: 40px 20px; text-align: center;\"\u003e\n\u003ch1 style=\"color: #fff; font-size: clamp(24px,5vw,36px); margin: 0 0 10px 0; font-weight: bold; letter-spacing: 1px;\"\u003eSHO-2-inch-4nm\u003c\/h1\u003e\n\u003cp style=\"color: #00d4ff; font-size: clamp(14px,3vw,18px); margin: 0; text-transform: uppercase; letter-spacing: 2px;\"\u003ePrecision Narrowband Filter\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"max-width: 1200px; margin: 0 auto; padding: 20px;\"\u003e\n\u003cdiv style=\"background: #f8f9fa; border-radius: 12px; padding: 30px 20px; margin-bottom: 30px; box-shadow: 0 2px 10px rgba(0,0,0,.05);\"\u003e\n\u003ch2 style=\"color: #1a1a3e; font-size: clamp(20px,4vw,28px); margin: 0 0 20px 0; border-left: 4px solid #00d4ff; padding-left: 15px;\"\u003eToupTek Astro SHO Narrowband Filter Introduction\u003c\/h2\u003e\n\u003cp style=\"color: #4a4a4a; font-size: clamp(14px,2.5vw,16px); line-height: 1.8; margin: 0;\"\u003eNarrowband filters are essential for astrophotography. The ToupTek Astronomy SHO filter targets the three key ionized emission lines in stellar nurseries: Hα, SII, and OIII. With a narrower 4nm FWHM bandpass, it precisely transmits the target light while providing stronger suppression of urban light pollution and background gradients. This also reduces band overlap, resulting in higher signal-to-noise ratio, improved contrast, and more distinct detail. It is well-suited for creating images in the Hubble Palette.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; margin-bottom: 40px;\"\u003e\u003cimg style=\"max-width: 100%; height: auto; border-radius: 8px; box-shadow: 0 4px 20px rgba(0,0,0,.1);\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/4nm_SHO_detail_01.jpg\" alt=\"SHO Filter Product\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"background: #fff; border: 1px solid #e0e0e0; border-radius: 12px; padding: 30px 20px; margin-bottom: 30px;\"\u003e\n\u003ch2 style=\"color: #1a1a3e; font-size: clamp(20px,4vw,28px); margin: 0 0 25px 0; text-align: center;\"\u003eTechnical Parameters\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit,minmax(250px,1fr)); gap: 20px;\"\u003e\n\u003cdiv style=\"padding: 15px; background: linear-gradient(135deg,#f5f7fa 0,#fff 100%); border-radius: 8px; border-left: 3px solid #00d4ff;\"\u003e\n\u003cstrong style=\"color: #1a1a3e; display: block; margin-bottom: 5px;\"\u003eSize\u003c\/strong\u003e \u003cspan style=\"color: #4a4a4a;\"\u003e2\"\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 15px; background: linear-gradient(135deg,#f5f7fa 0,#fff 100%); border-radius: 8px; border-left: 3px solid #00d4ff;\"\u003e\n\u003cstrong style=\"color: #1a1a3e; display: block; margin-bottom: 5px;\"\u003eGlass Thickness\u003c\/strong\u003e \u003cspan style=\"color: #4a4a4a;\"\u003e2mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 15px; background: linear-gradient(135deg,#f5f7fa 0,#fff 100%); border-radius: 8px; border-left: 3px solid #00d4ff;\"\u003e\n\u003cstrong style=\"color: #1a1a3e; display: block; margin-bottom: 5px;\"\u003eTransmittance\u003c\/strong\u003e \u003cspan style=\"color: #4a4a4a;\"\u003e＞90%\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 15px; background: linear-gradient(135deg,#f5f7fa 0,#fff 100%); border-radius: 8px; border-left: 3px solid #00d4ff;\"\u003e\n\u003cstrong style=\"color: #1a1a3e; display: block; margin-bottom: 5px;\"\u003eFWHM\u003c\/strong\u003e \u003cspan style=\"color: #4a4a4a;\"\u003eH-alpha (4nm) \/ SII (4nm) \/ OIII (4nm)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 15px; background: linear-gradient(135deg,#f5f7fa 0,#fff 100%); border-radius: 8px; border-left: 3px solid #00d4ff;\"\u003e\n\u003cstrong style=\"color: #1a1a3e; display: block; margin-bottom: 5px;\"\u003eGlass Material\u003c\/strong\u003e \u003cspan style=\"color: #4a4a4a;\"\u003eQuartz glass\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 15px; background: linear-gradient(135deg,#f5f7fa 0,#fff 100%); border-radius: 8px; border-left: 3px solid #00d4ff;\"\u003e\n\u003cstrong style=\"color: #1a1a3e; display: block; margin-bottom: 5px;\"\u003eFrame Material\u003c\/strong\u003e \u003cspan style=\"color: #4a4a4a;\"\u003eAluminum Alloy\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 15px; background: linear-gradient(135deg,#f5f7fa 0,#fff 100%); border-radius: 8px; border-left: 3px solid #00d4ff;\"\u003e\n\u003cstrong style=\"color: #1a1a3e; display: block; margin-bottom: 5px;\"\u003eCoating Technology\u003c\/strong\u003e \u003cspan style=\"color: #4a4a4a;\"\u003eIAD (Ion Assisted Deposition)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 15px; background: linear-gradient(135deg,#f5f7fa 0,#fff 100%); border-radius: 8px; border-left: 3px solid #00d4ff;\"\u003e\n\u003cstrong style=\"color: #1a1a3e; display: block; margin-bottom: 5px;\"\u003eOD\u003c\/strong\u003e \u003cspan style=\"color: #4a4a4a;\"\u003e≥5.0\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 25px; padding: 20px; background: #0f0f1e; border-radius: 8px;\"\u003e\n\u003ch3 style=\"color: #00d4ff; font-size: clamp(16px,3vw,20px); margin: 0 0 15px 0;\"\u003eTransmission Range:\u003c\/h3\u003e\n\u003cdiv style=\"color: #fff; font-size: clamp(13px,2.5vw,15px); line-height: 1.8;\"\u003e\n\u003cdiv style=\"margin-bottom: 8px;\"\u003e▲ H-alpha filter: Central wavelength 656.3nm\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 8px;\"\u003e▲ SII filter: Central wavelength 671.6nm\u003c\/div\u003e\n\u003cdiv\u003e▲ OIII filter: Central wavelength 500.7nm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; margin-bottom: 40px;\"\u003e\u003cimg style=\"max-width: 100%; height: auto; border-radius: 8px; box-shadow: 0 4px 20px rgba(0,0,0,.1);\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/4nm_SHO_detail_02.jpg\" alt=\"Filter Details\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"background: #fff; border-radius: 12px; padding: 30px 20px; margin-bottom: 30px; box-shadow: 0 2px 10px rgba(0,0,0,.05);\"\u003e\n\u003ch2 style=\"color: #1a1a3e; font-size: clamp(20px,4vw,28px); margin: 0 0 20px 0; text-align: center;\"\u003eSpectrum Analysis\u003c\/h2\u003e\n\u003cdiv style=\"text-align: center; margin-bottom: 25px;\"\u003e\u003cimg style=\"max-width: 100%; height: auto; border-radius: 8px;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/4nm_SHO_detail_03.jpg\" alt=\"Spectrum Chart\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"background: #f8f9fa; border-radius: 8px; padding: 20px;\"\u003e\n\u003ch3 style=\"color: #1a1a3e; font-size: clamp(16px,3vw,18px); margin: 0 0 15px 0;\"\u003eSpectral Chart Reading Tips:\u003c\/h3\u003e\n\u003cul style=\"color: #4a4a4a; font-size: clamp(13px,2.5vw,15px); line-height: 1.8; margin: 0; padding-left: 20px;\"\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003eThe horizontal axis represents the wavelength of light (in nm), and the vertical axis represents the light transmittance (in percentage %). The red line indicates Hα (656 nm), the green line indicates OIII (500.7 nm), and the blue line indicates SII (672.4 nm).\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003eThe emission nebula signal bands are mainly concentrated around 656nm (Hα), 500.7nm (OIII), and other bands.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003eLight pollution peaks are commonly found near 540nm and 590nm (sodium lamp\/mercury lamp bands).\u003c\/li\u003e\n\u003cli\u003eThe transmission regions avoid major interference bands to ensure effective signal passage, enhancing contrast and image purity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: linear-gradient(135deg,#1a1a3e 0,#0f0f1e 100%); border-radius: 12px; padding: 40px 20px; margin-bottom: 30px;\"\u003e\n\u003ch2 style=\"color: #fff; font-size: clamp(20px,4vw,28px); margin: 0 0 30px 0; text-align: center;\"\u003eKey Features\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 30px;\"\u003e\n\u003ch3 style=\"color: #00d4ff; font-size: clamp(16px,3vw,20px); margin: 0 0 15px 0;\"\u003ePrecise Band Control, Enhanced Detail Resolution\u003c\/h3\u003e\n\u003cp style=\"color: #e0e0e0; font-size: clamp(13px,2.5vw,15px); line-height: 1.8; margin: 0 0 15px 0;\"\u003ePrecise narrowband filters suppress background noise while highlighting elemental emission structures, revealing celestial stratification and fine details.\u003c\/p\u003e\n\u003cdiv style=\"background: rgba(0,212,255,.1); border-radius: 8px; padding: 15px;\"\u003e\n\u003cdiv style=\"color: #fff; font-size: clamp(13px,2.5vw,14px); line-height: 1.8;\"\u003e\n\u003cdiv style=\"margin-bottom: 8px;\"\u003e▲ Hα (656.3nm | 4nm FWHM): Optimized for hydrogen regions; primary channel for nebular morphology.\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 8px;\"\u003e▲ OIII (500.7nm | 4nm FWHM): Targets high-energy zones; reveals blue-green nebular details.\u003c\/div\u003e\n\u003cdiv\u003e▲ SII (671.6nm | 4nm FWHM): Enhances detection of faint signals; Significantly boosts contrast when combined with Hα.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 30px;\"\u003e\n\u003ch3 style=\"color: #00d4ff; font-size: clamp(16px,3vw,20px); margin: 0 0 15px 0;\"\u003eHigh-Quality Quartz Glass\u003c\/h3\u003e\n\u003cp style=\"color: #e0e0e0; font-size: clamp(13px,2.5vw,15px); line-height: 1.8; margin: 0;\"\u003eToupTek filters feature high-purity quartz glass substrates with \u0026gt;90% transmittance. They deliver exceptional blue-violet transmission and thermal stability, ideal for demanding astronomical imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 30px;\"\u003e\n\u003ch3 style=\"color: #00d4ff; font-size: clamp(16px,3vw,20px); margin: 0 0 15px 0;\"\u003eIAD Dense Coating\u003c\/h3\u003e\n\u003cp style=\"color: #e0e0e0; font-size: clamp(13px,2.5vw,15px); line-height: 1.8; margin: 0;\"\u003eUsing IAD (Ion Assisted Deposition) coating technology, which produces denser and more uniform coatings that are durable, corrosion-resistant, and have superior environmental stability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 30px;\"\u003e\n\u003ch3 style=\"color: #00d4ff; font-size: clamp(16px,3vw,20px); margin: 0 0 15px 0;\"\u003ePrecision Coating\u003c\/h3\u003e\n\u003cp style=\"color: #e0e0e0; font-size: clamp(13px,2.5vw,15px); line-height: 1.8; margin: 0;\"\u003eToupTek filters use a proprietary multi-layer coating system—including single-sided cutoff, front AR coating, and edge blackening—to eliminate halos, minimize stray light, and ensure long-term durability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 30px;\"\u003e\n\u003ch3 style=\"color: #00d4ff; font-size: clamp(16px,3vw,20px); margin: 0 0 15px 0;\"\u003eHigh Optical Cutoff Depth\u003c\/h3\u003e\n\u003cp style=\"color: #e0e0e0; font-size: clamp(13px,2.5vw,15px); line-height: 1.8; margin: 0;\"\u003eAll filters feature OD≥5.0 cutoff depth, blocking unwanted light to eliminate artifacts and deliver true-to-life color reproduction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 30px;\"\u003e\n\u003ch3 style=\"color: #00d4ff; font-size: clamp(16px,3vw,20px); margin: 0 0 15px 0;\"\u003eMatte Black Edge Coating\u003c\/h3\u003e\n\u003cp style=\"color: #e0e0e0; font-size: clamp(13px,2.5vw,15px); line-height: 1.8; margin: 0;\"\u003eAll filters feature matte black edge treatment to eliminate stray light, ensuring optimal transmittance and contrast. 2\" filters feature threaded aluminum alloy frames for direct screw-in installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3 style=\"color: #00d4ff; font-size: clamp(16px,3vw,20px); margin: 0 0 15px 0;\"\u003eHighly Compatible\u003c\/h3\u003e\n\u003cp style=\"color: #e0e0e0; font-size: clamp(13px,2.5vw,15px); line-height: 1.8; margin: 0;\"\u003eAll filters use a single-piece, glue-free structure. 2\": Full-frame \u0026amp; smaller sensors. Compatible with industry-standard filter wheels: 2\": 5-hole\/ 7-hole\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #fff; border-radius: 12px; padding: 30px 20px; margin-bottom: 30px; box-shadow: 0 2px 10px rgba(0,0,0,.05);\"\u003e\n\u003ch2 style=\"color: #1a1a3e; font-size: clamp(20px,4vw,28px); margin: 0 0 30px 0; text-align: center;\"\u003ePerformance Gallery\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 30px;\"\u003e\n\u003cimg style=\"max-width: 100%; height: auto; border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,.1);\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/4nm_SHO_detail_04.jpg\" alt=\"IC5070 Astrophotography\"\u003e\n\u003cdiv style=\"background: #f8f9fa; border-radius: 8px; padding: 15px; margin-top: 15px;\"\u003e\n\u003ch4 style=\"color: #1a1a3e; font-size: clamp(14px,3vw,18px); margin: 0 0 10px 0;\"\u003eIC5070\u003c\/h4\u003e\n\u003cdiv style=\"color: #4a4a4a; font-size: clamp(12px,2.5vw,14px); line-height: 1.6;\"\u003e\n\u003cdiv\u003ePhotographer: voice | Telescope: Sky-Watcher | Mount: UMI\u003c\/div\u003e\n\u003cdiv\u003eCamera: ToupTek Astro ATR2600M | Filters: ToupTek Astro LRGB\u0026amp;SHO\u003c\/div\u003e\n\u003cdiv\u003eIntegration: Hα: 30 x 600s; SII: 30 x 600s; OIII: 30 x 600s\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eTotal exposure: 15h\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 30px;\"\u003e\n\u003cimg style=\"max-width: 100%; height: auto; border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,.1);\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/4nm_SHO_detail_05.jpg\" alt=\"IC 443 Astrophotography\"\u003e\n\u003cdiv style=\"background: #f8f9fa; border-radius: 8px; padding: 15px; margin-top: 15px;\"\u003e\n\u003ch4 style=\"color: #1a1a3e; font-size: clamp(14px,3vw,18px); margin: 0 0 10px 0;\"\u003eIC 443\u003c\/h4\u003e\n\u003cdiv style=\"color: #4a4a4a; font-size: clamp(12px,2.5vw,14px); line-height: 1.6;\"\u003e\n\u003cdiv\u003ePhotographer: voice\u0026amp;免贵姓姚 | Telescope: Sky-Watcher F3.4\u003c\/div\u003e\n\u003cdiv\u003eCamera: ToupTek Astro ATR2600M\/ATR2600C | Mount: UMi\u003c\/div\u003e\n\u003cdiv\u003eFilters: ToupTek Astro SHO 4nm\u003c\/div\u003e\n\u003cdiv\u003eProcessing: Narrowband combination using HSO channel mapping\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eTotal exposure: 20h\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 30px;\"\u003e\n\u003cimg style=\"max-width: 100%; height: auto; border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,.1);\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/4nm_SHO_detail_06.jpg\" alt=\"NGC2237 Astrophotography\"\u003e\n\u003cdiv style=\"background: #f8f9fa; border-radius: 8px; padding: 15px; margin-top: 15px;\"\u003e\n\u003ch4 style=\"color: #1a1a3e; font-size: clamp(14px,3vw,18px); margin: 0 0 10px 0;\"\u003eNGC2237\u003c\/h4\u003e\n\u003cdiv style=\"color: #4a4a4a; font-size: clamp(12px,2.5vw,14px); line-height: 1.6;\"\u003e\n\u003cdiv\u003ePhotographer: 原上行川 | Telescope: Askar SQA55\u003c\/div\u003e\n\u003cdiv\u003eCamera: ToupTek Astro ATR2600M | Mount: iOptron HAE16C\u003c\/div\u003e\n\u003cdiv\u003eFilters: ToupTek Astro SHO | Astrophotography wireless controller: StellaVita\u003c\/div\u003e\n\u003cdiv\u003eIntegration: Hα:71, OIII: 63, SII: 49\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eTotal exposure: 15h\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f8f9fa; border-radius: 12px; padding: 30px 20px; margin-bottom: 30px;\"\u003e\n\u003ch2 style=\"color: #1a1a3e; font-size: clamp(20px,4vw,28px); margin: 0 0 20px 0; text-align: center;\"\u003eInstallation\u003c\/h2\u003e\n\u003cp style=\"color: #4a4a4a; font-size: clamp(14px,2.5vw,16px); text-align: center; margin: 0 0 20px 0;\"\u003eScrew directly into filter wheels—no front\/back orientation needed.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg style=\"max-width: 100%; height: auto; border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,.1);\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/4nm_SHO_detail_07.jpg\" alt=\"Installation Guide\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: linear-gradient(135deg,#fff 0,#f8f9fa 100%); border: 2px solid #00d4ff; border-radius: 12px; padding: 30px 20px; margin-bottom: 30px;\"\u003e\n\u003ch2 style=\"color: #1a1a3e; font-size: clamp(20px,4vw,28px); margin: 0 0 20px 0; text-align: center;\"\u003eWarranty and Service\u003c\/h2\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit,minmax(280px,1fr)); gap: 20px; margin-bottom: 20px;\"\u003e\n\u003cdiv style=\"padding: 20px; background: #fff; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,.05);\"\u003e\n\u003ch3 style=\"color: #00d4ff; font-size: clamp(14px,3vw,18px); margin: 0 0 10px 0;\"\u003eQuality Assurance\u003c\/h3\u003e\n\u003cp style=\"color: #4a4a4a; font-size: clamp(13px,2.5vw,15px); line-height: 1.6; margin: 0;\"\u003eEach filter undergoes pre-delivery spectral testing and rigorous screening to ensure consistent optical performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 20px; background: #fff; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,.05);\"\u003e\n\u003ch3 style=\"color: #00d4ff; font-size: clamp(14px,3vw,18px); margin: 0 0 10px 0;\"\u003eAfter-sales Policy\u003c\/h3\u003e\n\u003cp style=\"color: #4a4a4a; font-size: clamp(13px,2.5vw,15px); line-height: 1.6; margin: 0;\"\u003eA two-year warranty covers manufacturing defects. ToupTek Astro offers professional technical support and usage guidance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; padding: 20px; background: #0f0f1e; border-radius: 8px;\"\u003e\n\u003cp style=\"color: #fff; font-size: clamp(13px,2.5vw,15px); margin: 0 0 10px 0;\"\u003eFor assistance, contact our customer service or technical support:\u003c\/p\u003e\n\u003ca style=\"color: #00d4ff; text-decoration: none; font-size: clamp(14px,3vw,16px); font-weight: bold;\" href=\"https:\/\/touptek-astro.com\/supports\"\u003etouptek-astro.com\/supports\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #fff3cd; border-left: 4px solid #ffc107; border-radius: 8px; padding: 20px; margin-bottom: 30px;\"\u003e\n\u003ch3 style=\"color: #856404; font-size: clamp(16px,3vw,20px); margin: 0 0 15px 0;\"\u003eImportant Notes\u003c\/h3\u003e\n\u003cul style=\"color: #856404; font-size: clamp(13px,2.5vw,15px); line-height: 1.8; margin: 0; padding-left: 20px;\"\u003e\n\u003cli style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eColor Variation:\u003c\/strong\u003e Filter coating colors may appear different under varying lighting conditions and viewing angles - this is normal optical behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Improvements:\u003c\/strong\u003e We continually optimize our products, which may result in minor specification and appearance updates. Specifications are subject to change without notice. Please refer to the physical product for final details.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"ToupTek Astro","offers":[{"title":"SII Filter 4nm","offer_id":51181464813880,"sku":null,"price":209.0,"currency_code":"USD","in_stock":true},{"title":"Hα Filter 4nm","offer_id":51181464846648,"sku":null,"price":209.0,"currency_code":"USD","in_stock":true},{"title":"OIII Filter 4nm","offer_id":51181464879416,"sku":null,"price":209.0,"currency_code":"USD","in_stock":true},{"title":"SHO Filters Set 4nm","offer_id":51181464912184,"sku":null,"price":599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/HEADERSHO4nm-01.jpg?v=1759217449"},{"product_id":"puresight-a1-dual-narrowband-filter","title":"2inch Dual Narrowband Filter","description":"\u003cdiv style=\"max-width:1200px;margin:0 auto;padding:20px\"\u003e\n\u003cdiv style=\"background:#f8f9fa;border-radius:12px;padding:30px 20px;margin-bottom:30px;box-shadow:0 2px 10px rgba(0,0,0,.05)\"\u003e\n\u003ch2 style=\"color:#1a1a3e;font-size:clamp(20px,4vw,28px);margin:0 0 20px 0;border-left:4px solid #00d4ff;padding-left:15px\"\u003eToupTek Astro PureSight A1 Dual Narrowband Filter Introduction\u003c\/h2\u003e\n\u003cp style=\"color:#4a4a4a;font-size:clamp(14px,2.5vw,16px);line-height:1.8;margin:0\"\u003eToupTek Astro PureSight A1 Hα \u0026amp; OIII Dual Narrowband Filter is designed for deep-sky astrophotography under light-polluted skies. With a precise 5nm bandpass and optimization for fast optical systems, it enhances nebula contrast while effectively suppressing unwanted background light.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;margin-bottom:40px\"\u003e\u003cimg style=\"max-width:100%;height:auto;border-radius:8px;box-shadow:0 4px 20px rgba(0,0,0,.1)\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/touptek-puresight-a1-dual-narrowband-filter-hero.jpg\" alt=\"ToupTek Astro PureSight A1 Dual Narrowband Filter\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border-radius:12px;padding:30px 20px;margin-bottom:30px;box-shadow:0 2px 10px rgba(0,0,0,.05)\"\u003e\n\u003ch2 style=\"color:#1a1a3e;font-size:clamp(20px,4vw,28px);margin:0 0 20px 0;border-left:4px solid #00d4ff;padding-left:15px\"\u003eUser Gallery\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom:30px\"\u003e\n\u003cdiv style=\"background:#f8f9fa;border-radius:8px;padding:15px;margin-bottom:15px\"\u003e\n\u003ch4 style=\"color:#1a1a3e;font-size:clamp(14px,3vw,18px);margin:0 0 10px 0\"\u003eSH2-308 (Bortle 4.9)\u003c\/h4\u003e\n\u003cdiv style=\"color:#4a4a4a;font-size:clamp(12px,2.5vw,14px);line-height:1.6\"\u003e\n\u003cdiv\u003eCr. Pai Xing Kong De T\u003c\/div\u003e\n\u003cdiv\u003eTelescope: SKY ROVER 70SA\u003c\/div\u003e\n\u003cdiv\u003eCamera: ASI2600MC\u003c\/div\u003e\n\u003cdiv\u003eFilter: ToupTek Astro PureSight A1 Hα \u0026amp; [OIII] 5nm F\/3.2\u003c\/div\u003e\n\u003cdiv\u003eExposure: 10h of Hα \u0026amp; OIII + 1.5h RGB stars\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cimg style=\"max-width:100%;height:auto;border-radius:8px;box-shadow:0 4px 15px rgba(0,0,0,.1)\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/dual-narrowband-filter-SH2-308.jpg\" alt=\"SH2-308 Astrophotography\"\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"background:#f8f9fa;border-radius:8px;padding:15px;margin-bottom:15px\"\u003e\n\u003ch4 style=\"color:#1a1a3e;font-size:clamp(14px,3vw,18px);margin:0 0 10px 0\"\u003eRosette Nebula (Full Moon)\u003c\/h4\u003e\n\u003cdiv style=\"color:#4a4a4a;font-size:clamp(12px,2.5vw,14px);line-height:1.6\"\u003e\n\u003cdiv\u003eCr. Pai Xing Kong De T\u003c\/div\u003e\n\u003cdiv\u003eTelescope: SKY ROVER 70SA\u003c\/div\u003e\n\u003cdiv\u003eCamera: ASI2600MC\u003c\/div\u003e\n\u003cdiv\u003eFilter: ToupTek Astro PureSight A1 Hα \u0026amp; [OIII] 5nm F\/3.2\u003c\/div\u003e\n\u003cdiv\u003eExposure: 300s × 49, 4.8h in total\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cimg style=\"max-width:100%;height:auto;border-radius:8px;box-shadow:0 4px 15px rgba(0,0,0,.1)\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/dual-narrowband-filter-rosette-nebula.jpg\" alt=\"Rosette Nebula Astrophotography\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border:1px solid #e0e0e0;border-radius:12px;padding:30px 20px;margin-bottom:30px\"\u003e\n\u003ch2 style=\"color:#1a1a3e;font-size:clamp(20px,4vw,28px);margin:0 0 20px 0;border-left:4px solid #00d4ff;padding-left:15px\"\u003eWhat is a Dual Narrowband Filter?\u003c\/h2\u003e\n\u003cp style=\"color:#4a4a4a;font-size:clamp(14px,2.5vw,16px);line-height:1.8;margin:0 0 15px 0\"\u003eA dual narrowband filter is an astrophotography filter designed to isolate specific emission wavelengths, typically hydrogen-alpha (Hα) and oxygen III (OIII). By transmitting only these narrow spectral bands, the filter significantly enhances the visibility of emission nebulae while suppressing background light pollution.\u003c\/p\u003e\n\u003cp style=\"color:#4a4a4a;font-size:clamp(14px,2.5vw,16px);line-height:1.8;margin:0\"\u003eDual narrowband filters are widely used for deep-sky astrophotography, especially when imaging nebulae from urban or suburban locations where sky brightness can reduce contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:linear-gradient(135deg,#1a1a3e 0,#0f0f1e 100%);border-radius:12px;padding:40px 20px;margin-bottom:30px\"\u003e\n\u003ch2 style=\"color:#fff;font-size:clamp(20px,4vw,28px);margin:0 0 20px 0;border-left:4px solid #00d4ff;padding-left:15px\"\u003eHigh-Performance Dual Narrowband Filter for Fast Optical Systems\u003c\/h2\u003e\n\u003cp style=\"color:#e0e0e0;font-size:clamp(13px,2.5vw,15px);line-height:1.8;margin:0 0 15px 0\"\u003eToupTek Astro PureSight A1 Hα \u0026amp; OIII Dual Narrowband 5nm F\/3.2 Astronomical Filter is engineered specifically for astrophotography with fast optical systems.\u003c\/p\u003e\n\u003cp style=\"color:#e0e0e0;font-size:clamp(13px,2.5vw,15px);line-height:1.8;margin:0 0 15px 0\"\u003eWith precisely controlled \u003cstrong\u003e5nm FWHM bandpasses\u003c\/strong\u003e and center wavelengths optimized for fast optics, the filter delivers excellent performance on systems from \u003cstrong\u003eF\/3.2 and faster\u003c\/strong\u003e, achieving an ideal balance between strong light-pollution suppression and high signal transmission.\u003c\/p\u003e\n\u003cp style=\"color:#e0e0e0;font-size:clamp(13px,2.5vw,15px);line-height:1.8;margin:0\"\u003eAdvanced anti-reflection coatings and carefully controlled surface precision significantly reduce internal reflections, effectively suppressing halos and ghosting. The result is clean backgrounds, high contrast, and sharp stars, even when imaging from urban or suburban locations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border:1px solid #e0e0e0;border-radius:12px;padding:30px 20px;margin-bottom:30px\"\u003e\n\u003ch2 style=\"color:#1a1a3e;font-size:clamp(20px,4vw,28px);margin:0 0 25px 0;border-left:4px solid #00d4ff;padding-left:15px\"\u003eTechnical Parameters\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;font-size:clamp(13px,2.5vw,15px);table-layout:fixed\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eProduct Name\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003ePureSight A1 Hα \u0026amp; [OIII] Dual Narrowband 5nm F\/3.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eTarget Emission Lines\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eHα 656.3nm \u0026amp; [OIII] 500.7nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eFWHM\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003e5.0nm ± 1.2 \/ 5.0nm ± 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eTransmission Rate\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003e≥90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eOD\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003e≥5 @ 200-1100nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eSubstrate\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eFused Silica\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eThickness\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003e2.00mm ± 0.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eParallelism\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003e≤ 30\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eSurface Quality\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eRecommended F-ratio\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003e≥ F\/3.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eCoating\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eIAD (Ion Deposition)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003e2-inch (frame height: 5mm, thread height: 2mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eThread\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eM48×0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eFrame Material\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eAluminum Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eClear Aperture\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003e43.9mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:33.33%;padding:12px;border:1px solid #e0e0e0;background:#f8f9fa;font-weight:700;color:#1a1a3e;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eInstallation Direction\u003c\/td\u003e\n\u003ctd style=\"width:66.67%;padding:12px;border:1px solid #e0e0e0;color:#4a4a4a;vertical-align:top;word-break:break-word;overflow-wrap:break-word\"\u003eThreaded side toward the sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border-radius:12px;padding:30px 20px;margin-bottom:30px;box-shadow:0 2px 10px rgba(0,0,0,.05)\"\u003e\n\u003ch2 style=\"color:#1a1a3e;font-size:clamp(20px,4vw,28px);margin:0 0 20px 0;border-left:4px solid #00d4ff;padding-left:15px\"\u003eTransmission Spectrum\u003c\/h2\u003e\n\u003cdiv style=\"text-align:center;margin-bottom:20px\"\u003e\u003cimg style=\"max-width:100%;height:auto;border-radius:8px\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/touptek-dual-narrowband-filter-transmission-spectrum.jpg\" alt=\"Transmission Spectrum\"\u003e\u003c\/div\u003e\n\u003cp style=\"color:#4a4a4a;font-size:clamp(14px,2.5vw,16px);line-height:1.8;margin:0\"\u003eToupTek Astro PureSight A1 5nm Hα \u0026amp; [OIII] Dual Narrowband Filter features high transmission in both the Hα and [OIII] emission bands, while deeply blocking common light-pollution wavelengths. From fast optical systems to standard focal ratios, it extracts clean, high signal-to-noise nebular data for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:linear-gradient(135deg,#1a1a3e 0,#0f0f1e 100%);border-radius:12px;padding:40px 20px;margin-bottom:30px\"\u003e\n\u003ch2 style=\"color:#fff;font-size:clamp(20px,4vw,28px);margin:0 0 25px 0;border-left:4px solid #00d4ff;padding-left:15px\"\u003eKey Features\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom:30px\"\u003e\n\u003ch3 style=\"color:#00d4ff;font-size:clamp(16px,3vw,20px);margin:0 0 15px 0\"\u003eReduce Light Pollution with Precise Narrowband Control\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;font-size:clamp(13px,2.5vw,15px);line-height:1.8;margin:0 0 15px 0\"\u003eAstrophotographers often face challenges when imaging from urban or suburban locations where artificial lighting reduces contrast and washes out faint nebula structures.\u003c\/p\u003e\n\u003cp style=\"color:#e0e0e0;font-size:clamp(13px,2.5vw,15px);line-height:1.8;margin:0 0 15px 0\"\u003eThe ToupTek Astro PureSight A1 dual narrowband filter features a 5nm ultra-narrow FWHM bandpass precisely tuned to isolate Hα (656.3nm) and [OIII] (500.7nm) emission lines. This allows key nebula signals to pass through while effectively blocking most sources of artificial light pollution.\u003c\/p\u003e\n\u003cp style=\"color:#e0e0e0;font-size:clamp(13px,2.5vw,15px);line-height:1.8;margin:0 0 15px 0\"\u003eWith a blocking depth of OD ≥5 (0.001% transmission), the filter suppresses over 99.999% of unwanted light, including streetlights, neon lighting, and urban skyglow.\u003c\/p\u003e\n\u003cdiv style=\"background:rgba(0,212,255,.1);border-radius:8px;padding:15px\"\u003e\u003cdiv style=\"color:#fff;font-size:clamp(13px,2.5vw,14px);line-height:1.8\"\u003e\n\u003cdiv style=\"margin-bottom:8px\"\u003e▲ Higher-contrast nebula structures\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:8px\"\u003e▲ Cleaner and darker background sky\u003c\/div\u003e\n\u003cdiv\u003e▲ Improved signal-to-noise ratio (SNR)\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:30px\"\u003e\n\u003ch3 style=\"color:#00d4ff;font-size:clamp(16px,3vw,20px);margin:0 0 15px 0\"\u003eIdeal for Emission Nebula Imaging\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;font-size:clamp(13px,2.5vw,15px);line-height:1.8;margin:0 0 15px 0\"\u003eDual narrowband filters are particularly effective when capturing emission nebulae that radiate strongly in Hα and OIII wavelengths.\u003c\/p\u003e\n\u003cdiv style=\"background:rgba(0,212,255,.1);border-radius:8px;padding:15px\"\u003e\u003cdiv style=\"color:#fff;font-size:clamp(13px,2.5vw,14px);line-height:1.8\"\u003e\n\u003cdiv style=\"margin-bottom:8px\"\u003e▲ Orion Nebula (M42)\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:8px\"\u003e▲ Rosette Nebula\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:8px\"\u003e▲ Lagoon Nebula (M8)\u003c\/div\u003e\n\u003cdiv\u003e▲ Veil Nebula\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cp style=\"color:#e0e0e0;font-size:clamp(13px,2.5vw,15px);line-height:1.8;margin:15px 0 0 0\"\u003eWhen paired with a \u003cstrong\u003emonochrome or color astronomy camera\u003c\/strong\u003e, the filter enhances faint nebula structures while maintaining natural star colors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3 style=\"color:#00d4ff;font-size:clamp(16px,3vw,20px);margin:0 0 15px 0\"\u003eHigh Compatibility\u003c\/h3\u003e\n\u003cp style=\"color:#e0e0e0;font-size:clamp(13px,2.5vw,15px);line-height:1.8;margin:0\"\u003eStandard M48×0.75 thread, compatible with filter wheels and filter drawers. The 2-inch format is suitable for full-frame and smaller color astronomy cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border-radius:12px;padding:30px 20px;margin-bottom:30px;box-shadow:0 2px 10px rgba(0,0,0,.05)\"\u003e\n\u003ch2 style=\"color:#1a1a3e;font-size:clamp(20px,4vw,28px);margin:0 0 20px 0;border-left:4px solid #00d4ff;padding-left:15px\"\u003eExceptional Image Purity\u003c\/h2\u003e\n\u003cp style=\"color:#4a4a4a;font-size:clamp(14px,2.5vw,16px);line-height:1.8;margin:0 0 15px 0\"\u003e\u003cstrong\u003eHalo-free performance with premium optical materials\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv style=\"color:#4a4a4a;font-size:clamp(13px,2.5vw,15px);line-height:1.8;margin-bottom:20px\"\u003e\n\u003cdiv style=\"margin-bottom:8px\"\u003e• High-purity fused silica substrate combined with IAD (Ion Assisted Deposition) coating for dense and uniform layers.\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:8px\"\u003e• Advanced anti-reflection coatings significantly reduce internal reflections, halos, and ghosting.\u003c\/div\u003e\n\u003cdiv\u003e• ≥90% peak transmission, ≤30\" parallelism, and 60\/40 surface quality ensure a clean background and sharp stars.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"color:#4a4a4a;font-size:clamp(14px,2.5vw,16px);line-height:1.8;margin:0 0 20px 0\"\u003eCapture faint nebula details even from urban balconies or city skies.\u003c\/p\u003e\n\u003cdiv style=\"text-align:center\"\u003e\u003cimg style=\"max-width:100%;height:auto;border-radius:8px;box-shadow:0 4px 15px rgba(0,0,0,.1)\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/touptek-dual-narrowband-filter-exceptional-image-purity.jpg\" alt=\"Exceptional Image Purity\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f8f9fa;border-radius:12px;padding:30px 20px;margin-bottom:30px\"\u003e\n\u003ch2 style=\"color:#1a1a3e;font-size:clamp(20px,4vw,28px);margin:0 0 20px 0;border-left:4px solid #00d4ff;padding-left:15px\"\u003eInstallation\u003c\/h2\u003e\n\u003cp style=\"color:#4a4a4a;font-size:clamp(14px,2.5vw,16px);text-align:center;line-height:1.8;margin:0 0 15px 0\"\u003eToupTek Astro PureSight A1 5nm Hα \u0026amp; [OIII] Dual Narrowband Filter features a specialized coating process that eliminates the need to identify front or back—simply screw it in for quick and easy installation.\u003c\/p\u003e\n\u003cp style=\"color:#4a4a4a;font-size:clamp(14px,2.5vw,16px);text-align:center;line-height:1.8;margin:0 0 20px 0\"\u003eThe filter comes standard with a 2-inch housing and M48×0.75 thread, ensuring direct compatibility with most astrophotography accessories. During installation, please ensure that the threaded side faces the camera sensor.\u003c\/p\u003e\n\u003cdiv style=\"text-align:center\"\u003e\u003cimg style=\"max-width:100%;height:auto;border-radius:8px;box-shadow:0 4px 15px rgba(0,0,0,.1)\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/touptek-dual-narrowband-filter-installation.jpg\" alt=\"Installation Guide\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"ToupTek Astro","offers":[{"title":"Default Title","offer_id":51882609934648,"sku":null,"price":289.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0833\/1532\/7288\/files\/touptek-dual-narrowband-filter-back.jpg?v=1773311802"}],"url":"https:\/\/www.touptekastro.com\/ja\/collections\/astrophotography-filters.oembed","provider":"ToupTek Astro","version":"1.0","type":"link"}