SVBONY Telescope Filter 2"&1.25" CLS Filter City Light Pollution Reduction Filter
Product details
| Management number | 208573448 | Release Date | 2026/03/22 | List Price | $29.20 | Model Number | 208573448 | ||
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CLS Filter 2 &1.25 inches enhances the visibility of deep-sky objects like nebulae by selectively reducing the transmission of light pollution wavelengths, specifically targeting both artificial light pollution and detrimental natural light.
- 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 435nm and 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
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