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