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SVBONY 1.25"CLS City Light Suppression Broadband Filter for Astro Photography US
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.
- 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
- 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
- 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.
- Brand: SVBONY
- Type: City Light Suppression Filter (CLS Filter)
- Material: Optical glass lens, Aluminum Frame
- Shape: Round
- Barrel diameter: 1.25''
- Thread: Standard M28.5*0.6mm
- Net Weight: 5.2g / 0.18oz
- SVBONY 1.25 inch CLS Filter
- Sturdy Plastic Case
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purchase, we'll be happy to make an exchange or refund the product price
less S&H within 30 days of your purchase via parcel post.
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On Aug-07-19 at 02:00:20 PDT, seller added the following information:
Filed under: Eyepieces & Accessories