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    ToupTek Astro

    LRGB Filters

    LRGB Filters

    Telescope filters
    $129.00 USD
    $129.00 USD
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    Description
    REVIEWS
    Why Choose LRGB Filters?
    Designed to overcome light pollution, the ToupTek Astro LRGB filter set empowers astrophotographers to reveal the universe's authentic chromatic splendor.

    The RGB three-channel filters are essential tools for monochrome astronomy cameras to capture professional-grade images.

    ToupTek Astro LRGB filters utilize advanced optical materials and precise coating technology to selectively transmit celestial emissions while blocking urban light pollution. This brings the true colors of the starry sky vividly to life and significantly enhances image contrast.

    Even faint celestial targets can reveal rich details. The extremely low halo effect ensures each image has excellent fidelity, elevating your astrophotography to the next level.
    LRGB filters for astrophotography
    Technical Parameters
    Size: 36mm (unframed) / 1.25” (31.77mm) / 2”
    Glass Thickness: 2mm
    Transmission Range:
    L (420–690nm); R (595–695nm); G (495–580nm); B (400–510nm)
    Transmittance: >95%
    Glass Material: Quartz glass
    Frame Material: Aluminum Alloy
    Surface Treatment: Double-sided high-precision optical polishing
    Coating Technology: IAD (Ion Assisted Deposition) coating technology
    Coating System Design: AR anti-reflection coating + quartz glass + precision cutoff coating layer
    OD: ≥5.0
    LRGB filters for astrophotography
    Spectrum
    LRGB filters for astrophotography
    Spectral Chart Reading Tips:
    • The horizontal axis represents the wavelength of light (unit: nm), and the vertical axis represents light transmittance (unit: %).
      Gray line: L channel; Red: R; Green: G; Blue: B
    • The emission nebula signal bands are mainly concentrated around 656nm (Hα), 500.7nm (OIII), and other bands.
    • Light pollution peaks are commonly found near 540nm and 590nm (sodium/mercury lamp bands).
    • The transmission regions of the astronomical filters are engineered to avoid these interference bands, ensuring effective signal passage, enhancing contrast, and image purity.
    Key Features
    ▶️ Accurate Wavelength Bands, Restoring True Colors
    High-precision wavelength positioning, RGB reproduction closer to the human eye for more realistic target colors.

    ▲ L Filter (420–690nm): UV/IR cutoff for enhanced contrast and sharpness.
    ▲ R Filter (595–695nm): Highlighting the Hα and SII bands.
    ▲ G Filter (495–580nm): Suppresses mercury/sodium pollution while transmitting OIII.
    ▲ B Filter (400–510nm): Captures Hβ and OIII emissions.
    ▶️ High-Quality Quartz Glass, High Transparency and Purity
    ToupTek filters feature high-purity quartz glass substrates with >90% transmittance. They deliver exceptional blue-violet transmission and thermal stability, ideal for demanding astronomical imaging.
    ▶️ IAD Dense Coating, Durable and Stable
    Using IAD (Ion Assisted Deposition) coating technology, which is more costly than conventional vacuum evaporation but produces denser and more uniform coatings that are durable, corrosion-resistant, and have superior environmental stability.
    ▶️ Precision Coating, Significantly Suppresses Halos
    ToupTek 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.
    ▶️ High Optical Cutoff Depth, Restores Natural Colors
    All filters feature OD≥5.0 cutoff depth, blocking unwanted light to eliminate artifacts and deliver true-to-life color reproduction.
    ▶️ Matte Black Edge Coating, Easy Installation
    All filters feature matte black edge treatment to eliminate stray light, ensuring optimal transmittance and contrast.
    ▲ 36mm filters: Telescope-facing side has inward blackened border for instant orientation recognition.
    ▲ 1.25" & 2" filters: Feature threaded aluminum alloy frames for direct screw-in installation.
    ▶️ Highly Compatible
    All filters use a single-piece, glue-free structure.
    ▲ 36mm: APS-C & smaller sensors
    ▲ 1.25": 1-inch & smaller sensors
    ▲ 2": Full-frame & smaller sensors
    Compatible with industry-standard filter wheels:
    36mm: 7-hole / 1.25": 8-hole / 2": 5-hole
    LRGB filters for astrophotography
    ToupTek Astro LRGB Filter Performance
    NGC1999
    Photographer: voice
    Camera: ToupTek ATR2600M
    Guide camera: GPM462M
    Telescope: Sky-Watcher F3.4
    Mount: UMI
    Filters: ToupTek Astro 36mm LRGB&SHO
    Integration: 12 each of RGB 600s, L 600s × 36, Hα 600s × 48
    Total exposure: 20h
    NGC1999 Sample Image
    LBN777
    Photographer: voice & LiiiiiCo
    Camera: ToupTek ATR2600M
    Guide camera: GPM462M
    Telescope: Sky-Watcher F3.4
    Filters: ToupTek Astro 36mm LRGB&
    Mount: UMI
    Integration: 20 each of RGB 600s, L 600s × 60, Hα 1200s × 40
    Total exposure: 32h
    LBN777 Sample Image
    LDN 1532 & IC 2087
    Photographer: voice
    Camera: ToupTek ATR2600M
    Guide camera: GPM462M
    Telescope: Askar FRA400
    Mount: UMI
    Filters: ToupTek Astro 36mm LRGB&SHO
    Integration: 15 each of RGB 600s, L 600s × 45, Hα 600s × 66
    Total exposure: 26h
    LDN 1532 & IC 2087 Sample Image
    M81 & M82
    M81 & M82 Sample Image
    Photographer: yahushua
    Telescope: Askar 130HNT28-AL
    Camera: ToupTek Astro ATR585M
    Mounts: iOptron CEM26
    Guide camera: G3M2210M
    Filters: ToupTek Astro 1.25” LRGB & H-alpha
    Total exposure: 14h
    M81 & M82 Sample Image

    M81 L single exposure 300s

    M81 & M82 Sample Image

    M81 R single exposure 300s

    M81 & M82 Sample Image

    M81 G single exposure 300s

    M81 & M82 Sample Image

    M81 B single exposure 300s

    Installation
    36mm Filters: Align the inward black ring toward the telescope. Ensure instant orientation.
    1.25" & 2" Filters: Screw directly into filter wheels—no front/back orientation needed.
    HSO filters for astrophotography
    HSO filters for astrophotography
    LRGB filters for astrophotography
    Warranty and Service
    • Quality Assurance Inspection: Each filter undergoes pre-delivery spectral testing and rigorous screening to ensure consistent optical performance.
    • After-sales Policy: A two-year warranty covers manufacturing defects. ToupTek Astro offers professional technical support and usage guidance.
    • For assistance, contact our customer service or technical support through our support page:
      https://touptek-astro.com/supports
    Important Notes
    • Color Variation: Filter coating colors may appear different under varying lighting conditions and viewing angles—this is normal optical behavior.
    • Product Improvements: 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.

    Customer Reviews

    Based on 5 reviews
    60%
    (3)
    40%
    (2)
    0%
    (0)
    0%
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    R
    Reinhard Kuske
    Some Filters are contaminated with glue

    I give only four stars becouse some filters of the 36mm LRGBSHO filterset were contaminated with a kind of glue. The L filter was worst contaminated.
    I managed to clean the filters up and meanwhile they are working in Toupteks 7 x 36 mm electronic filter wheel together with the Touptek 2600 mono 2 Gen.
    As I am an experienced person regarding filter use and astrofotografy it was okay for me. But it is of course not okay regarding QC control and QM. Touptek needs to do their homework on filter Quality.

    L
    Larry Cable
    great filters but...

    I would have given these a 5* review, however despite the description on the product page it was not entirely obvious which way round to install these in the EFW as both sides appeared to have the same tint and reflection, they really need some form of labelling to resolve this unambiguously

    B
    Brian
    36mm LRGB

    I use the filters in combination with a ToupTek IMX571 Mono in a ToupTek 7x36mm filter wheel. For the telescope, I used a Takahashi FS-60CB with a 0.72x reducer, resulting in an f/4.3 setup.

    I tested the filters on the Pleiades and am extremely satisfied—I would definitely buy them again.

    It would just be helpful to have a clear marking indicating which side should face the camera or the telescope. Unfortunately, this is not really obvious, even when looking at the reflection of the filters.

    A
    Aki M
    Good filters

    I have now used these filters for 3 DSO targets and all have good results.
    For my use these filters are very good and work well with my ATR533M camera.

    M
    Martin Voigt
    Great stuff

    Due to all the clouds I was able to use the filters only once yet. Very good filters!

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