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SVBONY 2" CLS City Light Pollution Suppression Broadband Filter for Telescopes For Sale


SVBONY 2



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SVBONY 2" CLS City Light Pollution Suppression Broadband Filter for Telescopes:
$38

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Sign Up Now ! You may also like SVBONY 2" CLS City Light Suppression Light Pollution Broadband Filter Suitable for Visual & Astronomical Photography Product Description
Description 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.

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
  • Shape: Round
  • Thread: Standard M48*0.75mm
  • Net Weight: 5.2g / 0.18oz
Package Includes
  • SVBONY 2"CLS Filter
  • Sturdy Plastic Case
Payment Brand Shipping response Contact us Payment Brand 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.
Shipping Svbony has set up US/AU/UK/ES/DE/IT/FR oversea warehouses, trying to offer customers speedy best local service. We are a passionate and extraodinary team, committed to offering good products and keeping customers satisfied with their purchase. response Our goal is to make sure you are a happy customer and pleasant shopping with us.
If you are satisfied with the purchase and our total service, your comment is very important in our business success. Please take a minute to leave us a positive response with an overall Detailed Selling Rating (DSR) of 5
If you are not satisfied with your purchase in any way, Please give us the opportunity to resolve any problem. We understand the concerns and frustrations you might have, and will try our best to resolve the issues. Contact us Do not hesitate to contact us anytime before and after your purchase through the clicking "Contact seller' and we are committed to your 100% customer satisfaction or you can contact us
Our working time: 8:00am-18:00pm (Beijing Time). Because of time-difference, we cannot give you a quick reply sometimes. Please wait for some more time.
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On Mar-03-21 at 20:14:00 PST, seller added the following information:


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