• 210mm dovetail plate and adapter(clamp) set easily to do balance work;
• Dovetail clamp: two M8, five M6, and one 1/4'' hole;
• Dovetail plate: standard 1/4'' hole, The space at both ends can be passed by M6 screws to connect your telescope.

Note: These screws aren't included

• 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
• 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

• UHC filters or light pollution reduction filters are designed to selectively reduce the transmission of certain wavelengths of light;especially those produced by artificial light;
• Sky background is darker;and contrast of emission nebulae are noticeably improved;the perfect filter for viewing nebula from light polluted skies;or for boosting the contrast of nebula from dark sky sites;
• Due to its ability to produce exceptionally sharp and clear images;this UHC filter is considered one of the most popular astronomy accessories;it can be used not only for celestial observations but also for astrophotography;
• 1.25'' barrel diameter simply attach to eyepiece cased in a sturdy transparent case;standard filter thread for 1.25" eyepieces and other accessories;
• Optical glass lens;aluminum frame;significantly reduces light pollution;great for city and suburban observation.

The VPL Filter has premium quality metal rim and optics glass lens . Reduce glare and increase contrast of the Moon with the Svbony 1.25”/2'' VPL Filters. Also useful for extra bright planets as well as terrestrial viewing over sand or snow. We provide you with two sizes to choose from, 1.25'' and 2''.

Note: This polarizing filter is too thick and not suitable for SV226 filter drawers.