CCD SII Filter

Antlia 1.25" 3 nm S-II ultra - narrow band filter for astrophotography - images with extreme contrast even with strong light pollution

• 1.25" mounted with low-profile filter cell
• Suitable for telescopes and lenses with a focal ratio of f/3 and lower
• Schott optical base substrate
• Blackened edges to avoid internal reflections
• Extremely narrow bandwidth of only 3 nm for maximum contrast
• Central wavelength 671,6 nm
• Filter thickness 2 mm
• Comes in convenient plastic transport box

Antlia 2" 3 nm S-II ultra - narrow band filter for astrophotography - images with extreme contrast even with strong light pollution

• 2" mounted with low-profile filter cell
• Suitable for telescopes and lenses with a focal ratio of f/3 and lower
• Schott optical base substrate
• Blackened edges to avoid internal reflections
• Extremely narrow bandwidth of only 3 nm for maximum contrast
• Central wavelength 671,6 nm
• Filter thickness 2 mm
• Comes in convenient plastic transport box

AstrodonSII3_27R Narrowband Filter for Astrophotography

• 1,25" Narrowband Filter - mounted
• Emission line: H-Alpha 3nm bandwidth
• Thickness: 3mm - parfokal with all other Astrodon filters
• Transmission: better than 90%
• Best possible anti-reflection coating against halos around bright stars and ghost images

Astrodon HA5_27R Narrowband Filter for Astrophotography

• 1,25" Narrowband Filter - mounted
• Emission line: H-Alpha 5nm bandwidth
• Thickness: 3mm - parfokal with all other Astrodon filters
• Transmission: better than 90%
• Best possible anti-reflection coating against halos around bright stars and ghost images