SVBONY Filter for Photography Broadband CLS Filter for Astronomical Observation Photography CCD Cameras and DSLR (2 inch)
Free Shipping Included! SVBONY Filter for Photography Broadband CLS Filter for Astronomical Observation Photography CCD Cameras and DSLR (2 inch) by SVBONY at C Starr. MPN: FF9155. Hurry! Limited time offer. Offer valid only while supplies last. SVBONY city light suppression broadband filter is designed to improve the visibility of various deep sky objects;By selectively reducing the
SVBONY city light suppression broadband filter is designed to improve the visibility of various deep sky objects;By selectively reducing the transmission
of wavelengths of light pollutants;specifically those produced by artificial lighting including 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
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
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
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
Type: city light suppression filter (CLS Filter)
Material: optical glass lens;aluminum frame
Barrel diameter: 1.25 inch'
Thread: Standard M48x0.75mm
1xSVBONY 2" CLS filter
1xsturdy plastic case
Features & Highlights
- 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 435nmand 578nm
- Suitable for color CCD cameras and unmodified DSLR Urban optical filter can effectively suppress urban harmful light and improve the contrast of shooting target
|Item Size:||2.76 x 0.79 x 0.79 inches|
|Package Weight:||0.11 pounds|
|Package Size:||4.06 x 0.94 x 0.94 inches|
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