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SVBONY Filter for Photography Broadband CLS Filter for Astronomical Observation Photography CCD Cameras and DSLR (2 inch)

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item description

Size:2 inch 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 Warning: 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 4Shape: round Barrel diameter: 1.25 inch'
Thread: Standard M48x0.75mm Package includes: 1xSVBONY 2" CLS filter 1xsturdy
plastic case

Product Features

  • Product Dimensions: 2.7 x 2.7 x 0.8 inches
  • Item Weight: 1.76 ounces
  • Shipping Weight: 1.76 ounces
  • Make sure this fits. by entering your model number.
  • 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

Additional information

Size: 2 inch
MPN: FF9155
UPC: 609378745584
EAN: 0609378745584

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About us

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