Sell Svbony Telescope Filter UHC Filter Ultra High Contrast Filter EOS-C Clip-on for Canon CCD Cameras & DSLR Reduce Light Pollution best price

Features: 1.1.25 Inch this filter it can be used not only for celestial observations but also for astrophotography 2.Double sided multi layer coating with a broadband anti reflection coating on the back to reduce reflected light 3.Ultra thin filter cell minimize vignetting by maximize possible;0.1% transmission of off band specifically the major emission lines of artificial light pollution 4.Aerometal material precise CNC machining sand blasting CWL central wavelength no deviation affected by temperature change 5.Process black anodized finish extinction treatment to prevent reflection laser engraving no fading 6.This filter is not for EF-S camera lens Specification: Type: ultra high contrast filter (UHC filter) Material: optical glass lens, aluminum frame Net weight: 5.2g / 0.18oz Specification： Size：EOS-C Type：Ultra High Contrast Filter (UHC Filter) Thread：Canon EOS-C FAQ: Q:why there are black shadow in Canon and Nikon FF camera when using clip filter on astronomy telescope , which focal ratio is about F5.5 ? A: Becasue the effective imaging circle of the telescope is larger than the aperture of the built-in clip filter.But when use large aperture lens and small focus ratios telescope will avoid this. Or you can use the 2 inch filter to avoid it. WARNING: the filters of Svbony are not designed for sun observation. do not look at the sun with Svbony filter. you would be blind if you fail to observe the warning Note: This Filter is just for Canon CCD / DSLR Cameras,please cheack it before you buy. This Filter is not for EF-S camera Lens. Package Includes: 1xSvbony Canon UHC EOS-C clip-on filter 1xSturdy plastic case