Empty 2" Filter Cell (7-pack）

Upgrade Your Filters — Perfect Fit, Precision Build

This 2-inch astronomical empty filter cell is the ideal replacement for worn or incompatible filter holders. Crafted with CNC precision from full aluminum alloy and finished with durable black anodizing, it offers excellent performance and compatibility across multiple brands of filter wheels and adapters.

• 2-inch astronomical empty filter cell

• Perfect replacement for old filter cells with worn threads or mechanical dimensions incompatible with multi-brand filter wheels

• Fits filters with diameter between 44.5mm and 47.8mm, thickness no more than 3.1mm; effective clear aperture: 44.1mm

• Body thickness excluding threads: 5mm, also usable as a 2-inch 5mm adapter ring

• Full aluminum alloy with CNC precision machining and black anodizing; chamfer knurled for enhanced grip

• Inner walls and threads coated with matte, light-absorbing paint; outer ring laser-engraved with filter name for easy identification

• Both sides feature standard 2-inch filter threads (M48×0.75)

• Compatible with all standard 2-inch eyepieces, Barlow lenses, diagonals, adapter rings, filter drawers, and filter wheels

• Comes with a 2mm-thick retaining ring featuring 180-degree spaced grooves and raised bosses for securing filters; reversible installation for filters thicker than 2.5mm

Filter Cell Parameters