Narrowband Filters

Isolates the 500.7 nm OIII emission line 3 nm bandpass for high contrast Designed for f/4.0 or slower optical systems 3.0 mm thick, single-substra...

Isolates the 500.7nm OIII emission line 5nm bandwidth (FWHM) 3.0mm thick single substrate for parfocal use Transmitted wavefront better than 0.25 ...

Isolates the 500.7nm OIII emission line 8nm bandpass for high signal throughput Designed for f/4.0 or slower; measured 99.7% peak transmission at ...

Isolates the 500.7 nm OIII emission line 3 nm bandpass for high-contrast imaging Optimized for f/2.8 to f/3.6 optical systems Measured 99.2% peak ...

Central Wavelength: 672.4 nm (Sulfur-II) Bandwidth (FWHM): 3 nm Substrate Thickness: 3.0 mm Parfocal: Yes, with other Chroma astronomy filters...

Bandwidth: 5 nm Central Wavelength: 672.4 nm Target Emission: Sulfur-II Doublet (671.6 nm / 673.1 nm) Substrate Thickness: 3.0 mm Parfocal: Y...

Isolates the 672.4 nm SII doublet emission lines 8 nm bandpass optimized for high signal throughput Designed for f/4.0 or slower; measured 98.2% p...

Isolates the 672.4 nm SII emission line doublet 3 nm bandpass for high contrast Optimized for f/2.8 to f/3.6 optical systems Maintains 98.6% peak ...

Targets Hydrogen-Alpha emission nebulae 12nm bandpass for astrophotography 1.25-inch standard filter size Drastically improves contrast under ligh...

Isolates the Hydrogen-alpha emission line at a 12nm bandpass Standard 2-inch filter format for modern focusers and filter wheels Dramatically incr...

7nm H-Alpha Bandpass 2-inch Filter Format Isolates Hydrogen Emission Nebulae Blocks Urban Light Pollution Includes Individual Test Report Descr...

Isolates the ionized sulfur (S-II) emission line at 672nm Features a 12nm bandpass to increase contrast Standard 1.25-inch filter format Ideal for...

Isolates the ionized sulfur (S-II) emission line at 672nm Ultra-narrow 6.5nm bandpass for maximum contrast Standard 1.25-inch barrel size fits mos...

Isolates the 672nm Sulfur-II (S-II) emission line 12nm bandpass for high-contrast views 2-inch filter size with standard threads Blocks light poll...

6.5nm Narrow Bandpass Targets the 672nm Ionized Sulfur (S-II) Emission Line 2-inch Barrel Diameter for Larger Focusers Drastically Increases Contr...

Engineered to consume exactly 7.5mm of optical path Solves the Celestron RASA 8 25.0mm backfocus requirement with 17.5mm cameras Available in M42 ...

3nm Bandpass at 656nm Wavelength Maximizes Contrast for Emission Nebulae Extreme Rejection of Light Pollution and Skyglow Ion-Assisted, Anti-Refle...

Isolates the 656nm Hydrogen-alpha emission line 7nm bandpass for maximum contrast Blocks mercury vapor, sodium vapor, and natural skyglow Ideal fo...

H-alpha Filter: 7nm Bandpass centered at 656nm Oxygen-III Filter: 6.5nm Bandpass centered at 500nm Sulphur-II Filter: 6.5nm Bandpass Hubble Pa...

Complete SHO set includes H-alpha, OIII, and SII filters Ultra-narrow 3nm bandpass for maximum contrast Isolates 656nm Ha and 500nm OIII emission ...

Complete 5-Filter LRGB and H-Alpha Set 7nm H-Alpha Filter Centered at 656.3nm Blocks 589nm Sodium Light Pollution Line High Transmission for Natur...

Complete 7-filter set for monochrome astrophotography Includes Luminance, Red, Green, and Blue broadband filters Includes 7nm Hydrogen-alpha, 6.5n...

3nm Spectral Bandpass 500nm Central Wavelength (OIII) Ion-Assisted Multi-Layer Coatings Optimized for Monochrome Cameras Available in 2" Mounted o...

6.5nm Narrowband OIII Filter Centered on 500nm Wavelength Passes the 500.7nm OIII Emission Line Blocks Light Pollution and Skyglow Ideal for SHO H...