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SVBONY Canon EOS Clip Broadband CLS Filter City Light Suppression for CCD Cameras & DSLR

The SVBONY City Light Suppression broadband filter is
designed to improve the visibility of various Deepsky objects. By
selectively reducing the transmission of wavelengths of light
pollutants, specifically those produced by artificial lightings
including mercury vapor lamps, both high & low pressure sodium vapor
lights and the unwanted natural light caused by neutral oxygen emission
in our atmosphere (i.e. skyglow). 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 details for both visual and
photographic purpose at sub-rural area. Notes: The CLS EOS -C is suitable the
Camera type: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. Features:

  • Multi-layers anti-reflection coating
  • Non-cementing optical substrate coating
  • 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.
  • 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
  • 90% transmission of main nebula emission lines (i.e. 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 (i.e. Na 589nm, Hg 435nmand 578nm).

  • Suitable for color CCD cameras and unmodified DSLRs
  • 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. DO NOT LOOK AT THE SUN WITH SVBONY FILTER. You
    would be BLIND if you fail to observe the warning.

Specifications:

  • Brand: SVBONY
  • Type: City Light Suppression Filter (CLS Filter)
  • Material: Optical glass lens, Aluminum Frame
  • Net Weight: 5.2g / 0.18oz

Product Description

Package Includes 

  • SVBONY CLS EOS-C Clip-on Filter
  • Sturdy Plastic Case

 

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Svbony focus on telescope and optical accessories. Aim to supply the high quality products and best service to customers. Main items are including Telescope, Monocular, Binocular, Spotting scope, filter, eyepiece and other accessories. We hope that you could enjoy a much more clorful life by using our products.

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On Feb-10-20 at 23:18:04 PST, seller added the following information:

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