Product: SVBONY Telescope Filter H-Alpha 7nm for Canon EOS-C Clip Filter Narrowband Astronomical Photographic CCD Filter for Deep Sky
Brand: SVBONY
H-Alpha is 656nm mainly through the high permeability of the spectrum, and 656nm spectrum of the color presented by the red-based；
 300-1100nm cut-off depth to get the details of the launch nebula richer. Extremely narrow bandwidth allows only the 656nm band to pass through the filter；
 can effectively cut off the artificial light Na lamp and Hg lamp interference to make the transmission line through, so as to improve the nebula contrast；
 With CCD is better choice for deep sky photography and wide-field astrophotography high optical quality
 Precision double sided optical coating,non-two-piece glue, effectively improve the transmittance and cut-off depth Ion source assisted coating technology 
 To improve the density of the film to ensure that the filter wavelength to minimize 
 the impact of temperature caused by the temperature drift good treatment
 Optical equipment professional fine sandblasting and anode treatment,the box to do extinction treatment to prevent reflection suitable the Camera Type
 The SVBONY CLS EOS -C Filter is suitable the Camera Type for: 60D/60DA, 7D Mark II, 80D/800D, 77D/70D/760D/750D/700D 650D/600D, 550D/500D,
 400D, 100D/1100D/1200D/1300D. Notes, this Filter is not for EF-S camera Lens other attributes
 for the emission line 656nm transmittance of 85% or more;Precision CNC integrated molding;Multi-layers anti-reflection coating;
 Frame with high-quality aluminum alloy material, anodized extinction treatment Package Included：
 1xSVBNOY EOS-C H-Alpha 7nm Filter
 1xPP Material Plastic Box
Optical high-precision double-sided polishing to ensure that the parallelism is higher than 30 inch and high flatness 1/4λ; to ensure that does not affect the image quality
High cutoff the light damage and other stray light interference;electron gun evaporation technology
Using germany imported glass;using double-sided polishing processing
High uniformity planetary wheel coating fixture to improve the uniformity of the filter wavelength
The narrow band filter;even in areas where light pollution is heavy;and the full moon (the moon's largest and brightest) is the same; very narrow bandwidth;which reduces the interference of the external environment

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