SVBONY Telescope Filter CLS EOS-C Clip-on Filter Compatible for Canon Broadband City Light Reduction Filter for CCD Cameras DSLR
Product Description
SVBONY Telescope Filter CLS EOS-C Clip-on Filter Compatible for Canon Broadband City Light Reduction Filter for CCD Cameras DSLR
- Electron beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching;as well as stability on CWL (central wavelength) no deviation affected by temperature change
- Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off band
- 90% transmission of main nebula emission lines;such as Ha 656nm;OIII 496nm&500nm;SII672nm and H-beta 486nm
- 0.1% transmission of off-band;specifically the major emission lines of artificial light pollution;such as Na 589nm;Hg 435nm and 578nm
- Urban optical filter can effectively suppress urban harmful light and improve the contrast of shooting target
mercury vapor lamps;both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere;such as sky glow
Using Method
Together with the highly transparent in main nebula emission lines at OIII 496nm and 500nm;H-beta 486nm;NII 654nm and 658nm;H-alpha 656nm
as well as SII 672nm;the filter is suitable for enhancing the contrast and getting more details for both visual and photographic purpose at sub-rural area
Features
Multi layers anti-reflection coating Non cementing optical substrate coating Ultra-thin filter cell minimize vignetting by maximize possible
Aerometal material precise CNC machining sand blasting Process black anodized finish extinction treatment to prevent reflection laser engraving no fading
CLS with wider pass-band than UHC and hence is more favored when observing under mild to moderate light pollution
Light pollution filter do not eliminate the effects of light pollution or increase the object's brightness;in many cases;they increase the contrast between nebula and night sky;not brightening the nebula
Application:
the CLS EOS -C is suitable the camera type:EOS 60D;7D mark II, 80D;800D , 77D;70D;760D;750D;700D 650D;600D, 550D;500D, 400D, 100D;1100D;1200D;1300D
Warning:
this filter is not for EF-S camera lens
Notes:
the filters of SVBONY are not designed for sun observation;don not look directly into the sun with SVBONY filter;otherwise it will burn the eyes
Specifications: Type: city light suppression filter (CLS Filter)
Material: optical glass lens;aluminum frame
Shape: round
Package includes:
1xSVBONY CLS EOS-C clip-on filter
1xsturdy plastic case
Technical Specifications
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