Baader Filters

Conforms to the Johnson-Cousins UBVRI Photometric System Optimized for the Bessel I-Band (Infrared) Homofocal Design for Parfocal Operation with o...

6.5nm FWHM Bandpass Optimized for Modern CMOS Sensors Suppresses Halos and Internal Reflections High-Contrast for Sulfur-II Emission Nebulae Avail...

350nm Central Wavelength 60nm Bandwidth (320-380nm) ~80% Peak Transmission Blocks Visible and IR light from 200nm to 1120nm Dielectric Multi-Coate...

Set of 6 essential color filters for lunar and planetary observing Planeoptically polished to maintain image sharpness at high magnification Doubl...

65x65mm Unmounted Square Format Optimized for LED Light Pollution Rejection High-Contrast Views of Emission Nebulae Ideal Complement to Narrowband...

4nm Full-Width Half-Maximum (FWHM) Bandpass Optimized for Modern CMOS Sensors Available in 1.25" (M28.5 x 0.6) & 2" Mounted, 31mm, 36mm & ...

Set of three Red, Green, and Blue (RGB) filters Optimized for modern CMOS sensors to eliminate reflections Available in 1.25" & 2" mounted, 31...

Red (R) filter for LRGB astrophotography Available in 1.25" & 2" mounted, round unmounted and square sizes Optimized for modern CMOS sensors H...

9nm O-III Narrowband Passband Functions as a "Super-G" Green Filter Replacement CMOS-Optimized Coatings for High Contrast Reduces Impact of Atmosp...

H-alpha Bandpass Filter in 1.25" & 2" Sizes 20nm FWHM Bandwidth 656.3nm Center Wavelength Optimized for Color CMOS/CCD Cameras High-Contrast f...

4nm FWHM Bandpass for Sulfur-II (S-II) Engineered for f/2 Ultra-Highspeed Optical Systems Available in 1.25" & 2" Mounted, 31mm, 36mm, 50.4mm ...

Green (G) Component for LRGB Color Imaging Available in 1.25" & 2" Mounted, Round Unmounted and Square Sizes Optimized for Modern CMOS Sensors...

Engineered for f/2 ultra-highspeed optical systems 3.5nm bandpass for maximum H-alpha contrast CMOS-optimized with anti-reflection coatings Availa...

3.5 / 4nm Ultra-Narrow H-alpha, O-III & S-II Bandpasses Pre-Shifted for Fast f/3 "Ultra-Highspeed" Optical Systems CMOS-Optimized with Anti-Re...

4nm Bandwidth (FWHM) Pre-Shifted for Fast f/3 Optical Systems Available in 1.25" & 2" Mounted, 31mm, 36mm & 50.4mm Unmounted Round, and 50...

Engineered for ultra-fast f/2 optical systems 6.5nm H-alpha bandpass for high-contrast imaging CMOS-optimized to suppress halos and internal refle...

3.5nm H-alpha Bandpass Optimized for f/3 Ultra-High-Speed Systems Available in 1.25" & 2" mounted, 31mm, 36mm & 50.4mm round unmounted, an...

4nm FWHM Ultra-Narrow Bandpass Optimized for f/3 and Faster Optical Systems Available in 1.25" & 2" Mounted, 31mm, 36mm & 50.4mm Round Unm...

Available in 1.25" & 2" Mounted, Round Unmounted and Square Sizes Blue (B) Channel for LRGB Imaging Optimized for Modern CMOS Sensors Designed...

4nm FWHM Bandpass Optimized for f/2 Ultra-Highspeed Systems Available in 1.25" & 2" Mounted, 31mm, 36mm, 47.4mm (FCCT) & 50.4mm Round Unmo...

Serves as a high-transmission Luminance (L) filter Provides complete Ultraviolet (UV) and Infrared (IR) blocking Engineered with CMOS-optimized an...

3.5nm Ultra-Narrow Bandpass Available in 1.25" & 2" mounted, 31mm, 36mm & 50.4mm round unmounted, and 50x50mm & 65x65mm square sizes C...

2-inch (47.4 mm) unmounted clearglass filter Designed to be parfocal with other Baader narrowband filters CMOS-optimized anti-reflection coatings ...

6.5nm Sulfur-II Narrowband Filter Optimized for f/2 High-Speed Optical Systems Available in 1.25" & 2" Mounted, 31mm, 36mm, 50.4mm & 2" FC...