Filters

685nm Infrared (IR) Pass Filter Standard 1.25" Threaded Barrel Transmits >95% of light from 673nm to 1100nm Blocks Visible Light with OD2 Block...

3nm Dual-Bandpass: Isolates H-Alpha (656.3 nm) and OIII (500.7 nm) emission lines with extreme prejudice against light pollution. ≥85% Peak Tran...

Magnetic drawer for rapid filter changes CNC-molded integrated body for light-leak prevention Native M42x0.75 threads for common cameras and reduc...

Supports both 1.25" and 2" filters in one drawer 12-point M2.5 threaded mounting for guide camera stability Includes M42, M48, and M28.5 threads f...

Isolates the 656.3nm H-Alpha wavelength Aggressive 5nm Full Width at Half Maximum (FWHM) bandpass Peak transmittance of ≥90% for high signal throu...

Isolates the Oxygen III emission line at 500.7nm Extremely narrow 5nm Full Width at Half Maximum (FWHM) bandpass Achieves ≥90% peak light transmit...

Complete 1.25-inch SHO (SII, H-Alpha, OIII) filter set Tight 5nm bandpass for high-contrast imaging Peak transmission rate of ≥90% at key waveleng...

Captures Sulfur-II (SII) emission at a 672nm center wavelength Extremely narrow 5nm bandpass for maximum contrast Peak light transmission of ≥90% ...

Reduces violet fringing (chromatic aberration) in achromatic refractors Standard 1.25" filter threads for universal compatibility Blocks IR wavele...

Designed for urban astrophotography with one-shot color cameras Passes H-Alpha, OIII, H-Beta, and Near-Infrared (NIR) wavelengths Peak transmittan...

5-Bandpass broadband light pollution filter 2-inch size with M48x0.75 thread Over 90% peak transmittance for high signal OD4 blocking of key light...

Reduces light pollution from artificial lighting Enhances contrast for emission nebulae Available in 1.25", 2", and Canon EOS-C formats Durable al...

Blocks unwanted Ultraviolet (UV) and Infrared (IR) wavelengths Standard 2-inch filter threads for wide compatibility Improves image contrast and c...

Filter Type: Hydrogen-Beta (Hβ) Narrowband Available Sizes: 1.25" and 2" Mounted Primary Targets: Horsehead Nebula, California Nebula Manufacturin...

Unique Narrowband Design: Transmits both Hβ and OIII emission lines in a single, targeted passband for maximum contrast. Blocks Red Wavelengths:...

Isolates doubly ionized oxygen (OIII) emission lines Dramatically increases contrast on planetary nebulae and supernova remnants Manufactured by A...

City Light Suppression (CLS) Filter Blocks Sodium (Na) and Mercury (Hg) Wavelengths Enhances Contrast for Deep-Sky Objects Automatic Electronic De...

Dual-band filter isolates Hydrogen-alpha (656.3nm) and Oxygen-III (500.7nm) wavelengths Narrow 12nm bandpass dramatically increases contrast on em...

Designed for SFW50 & SFW50S Filter Wheels Adapts 50mm Unmounted Filters Thinner than 2.5mm Ensures Accurate and Stable Filter Seating Prevents...

Holds 8 x 36mm unmounted filters Ultra-low profile design, as thin as 14mm Gear-driven mechanism with anti-backlash for repeatability Dedicated 8t...

Accommodates 8 x 50mm unmounted filters Ultra low-profile body for systems with limited back focus Gear-driven mechanism with anti-backlash for re...

Accommodates 8 x 50mm round (or 2" mounted) filters Ultra low-profile design for tight back focus requirements Gear-driven with anti-backlash mech...

Integrates Off-Axis Guider and Filter Drawer 37.5 mm Optical Length Supports M48, M54, and M68 Connections Magnetic M48 Filter Holder 336 g (11.85...