Filters

ZWO Methane CH4 Filter 1.25" The ZWO Methane CH4 Filter 1.25″ is a special filter for photographic use. Its FWHM is 20 nm which is suitable for mos...

Antares 2" Neutral Density Filter Neutral density filters can reduce brightness across the visual spectrum without losing resolution, enhancing lun...

ZWO AR Protective Window for ASI ZWO D21 AR protect window Technical Parameter: Diameter: 21mm Type: AR window Thickness: 1.1mm Flatness: 1/4 λ Pro...

Tele Vue Bandmate OIII Filter The Tele Vue Bandmate OIII Filter passes light from doubly ionized oxygen atoms. As such, it is great for viewing pla...

Lunt 50mm Ha Etalon Filter The Lunt LS50FHa Solar Filter is a 50 mm aperture (no central obstruction) integrally tuned etalon for use on Lunt ED Re...

IDAS NB1 Nebula Booster Filter H-alpha, H-beta & OIII The IDAS NB1 Nebula Booster Filter is a triple line-pass filter (H-alpha, H-beta & OI...

IDAS NGS1 / LPS-D3 filter IDAS LPS-D3(formerly NGS1) filters enhance the contrast of astronomical emission nebulae against a sky with both man-made...

Chroma 5nm H-alpha Filter H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a na...

Astronomik Deep-Sky RGB filter Astronomik has added a new range of RGB filters to its line of World class products. The new Deep-Sky RGB filters ar...

Astronomik CLS Filter The Astronomik CLS Filter is a budget filter for visual observation, Black & White photography and CCD photographs of neb...

Astronomik Blue Type 2c Filter Our filter set especially designed for astrophotography with CCD cameras. These filters provide a natural color repr...

Antares Filter Neutral Density 25% Neutral density filters can reduce brightness across the visual spectrum without losing resolution, enhanci...

Baader C2 Swan-Band Filter (15nm) – OIII Parallel   Comet filter for the two brightest C2 emission lines at 511 and 514nm (called "Swan-Band") in ...

Baader O-III Super-G Filter (9nm) - CMOS Optimized   O-III Super-G filter with 9 nm FWHM and a maximum transmission of 97%.For visual and photogra...

Baader SLOAN/SDSS Filters – Photometric   Baader SLOAN-ugriz' Bandpass Filter Set, suitable from f/15 to f/1.8 SLOAN/SDSS (ugriz’) photometric fil...

Baader BCF 1 - DSLR Astro Conversion Filter for Canon APS-C Cameras (all latest models)   DSLR Conversion Filter for Canon APS-C cameras (all lates...

Baader ACF 2 DSLR Astro Conversion Filter Canon EOS 350D/20D/10D/30D   DSLR Conversion Filter for Canon EOS 350D/20D/10D/30D.  Limited Stock Turn y...

Baader ACF DSLR Astro Conversion Filter EOS 300D   DSLR Conversion Filter for Canon EOS 300D Turn your Canon DSLR into a superb deep sky AstroCamer...

Baader T-2 C-Mount with mounted UV/IR Cut Filter 1" (25.4mm) C-mount (external thd) to T-2 Thread (internal thd) With integrated 1¼" filter mount ...

Baader AstroSolar Spotting Scope Filter OD 5.0 (50mm - 150mm) This family of filters offers a stable and rigid solution for all spotting scopes, ca...

Thousand Oaks Broadband Light Pollution Reduction Filter - 1.25" Blocks most man-made light pollution (sky glow) from common sources such as mercu...

Artesky ERF rejection filter with metal cell The purpose of using an Energy Rejection Filter (ERF) is to prevent as much solar energy as possible f...

Artesky ERF rejection filter  The purpose of using an Energy Rejection Filter (ERF) is to prevent as much solar energy as possible from entering th...