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SVBONY Telescope Filter CLS EOS-C Clip-on Filter Compatible for Canon Broadband City Light Reduction Filter for CCD Cameras DSLR
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 and H-beta 486nm 0.1% transmission of off-band;specifically the major emission lines of artificial light pollution;such as Na 435nm and 578nm Urban optical filter can effectively suppress urban harmful light and improve the contrast of shooting target Dimensions 2.

Price is $73.00
Price: $72.99