SVBONY Filter CLS Clip-on EOS Clip Broadband Camera for CCD Camera with Telescope & DSL Astrophotography Monocular

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:

1.Multi-layers anti-reflection coating
2.Non-cementing optical substrate coating
3.Electron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching
4.Stability on CWL (central wavelength) no deviation affected by temperature change
5.For planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.
6.Ultra-thin filter cell minimize vignetting by maximize possible
7.Aerometal Material Precise CNC Machining Sand Blasting,process Black Anodized Finish Extinction Treatment to Prevent Reflection Laser Engraving No Fading
8.90% transmission of main nebula emission lines (i.e. Ha 656nm, OIII 496nm&500nm, SII672nm and H-beta 486nm).
9.0.1% transmission of off-band, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nmand 578nm).
10.Suitable for color CCD cameras and unmodified DSLRs
11.CLS with wider pass-band than UHC and hence is more favored when observing under mild to moderate light pollution.
12.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.

For CCD Cameras DSLR

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. 200D/250D Notes, this Filter is not for EF-S camera Lens.

Note:

This Filter is not for EF-S camera Lens.

How this filter works

The CLS has a wider pass-band than a narrower UHC filter, so it gives a more natural colour response than a UHC filter. CLS is therefore best for mild to moderate light pollution filter for suburban skies.

Artificial lighting such as mercury vapour lamps, both high & low pressure sodium vapour lights and unwanted natural light caused by neutral oxygen emission in our atmosphere (skyglow) are almost completely suppressed by the SVBONY CLS filter.

The filter selectively allows light from deepsky objects through, with high transmission of ionised oxygen O-III (496nm & 500nm), Hydrogen Beta / N-beta (486nm), N-II(654nm and 658nm), H-alpha(656nm) and S-II(672nm).

By selectively blocking light pollution and transmitting these desirable wavelengths, the contrast and detail of deepsky objects is greatly enhanced.

NOTE

Question:Can this be used to see the eclipse?
Answer:No you would blind yourself using this filter to view an eclipse. You need a dedicated sun filter that fits over the telescope lens, not the eyepiece. Sun filters reject something like 99.9999% of the sunlight before it enters the telescope.
Question:why there are black shadow in Canon and Nikon FF camera when using clip filter on astronomy telescope , which focal ratio is about F5.5 ?
Answer: Becasue the effective imaging circle of the telescope is larger than the aperture of the built-in clip filter.But when use large aperture lens and small focus ratios telescope will avoid this.
Or you can use the 2 inch filter to avoid it.
Question:Can we use this with nikon d850?
Answer: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

Buyers Show

Author:AstroOnBudget
From YouTube
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