SVBONY Telescope Filter UHC Filter Ultra High Contrast Filter EOS-C Clip-on for CCD Cameras & DSLR Reduce Light Pollution

SVBONY Telescope Filter UHC Filter Ultra High Contrast Filter EOS-C Clip-on for CCD Cameras & DSLR Reduce Light Pollution

• 1.25 Inch this filter it can be used not only for celestial observations but also for astrophotography
• Double sided multi layer coating with a broadband anti reflection coating on the back to reduce reflected light
• Ultra thin filter cell minimize vignetting by maximize possible;0.1% transmission of off band specifically the major emission lines of artificial light pollution
• Aerometal material precise CNC machining sand blasting CWL central wavelength no deviation affected by temperature change
• Process black anodized finish extinction treatment to prevent reflection laser engraving no fading