The StarGuy 2" UHC, Ultra High Contrast filter, is the designed to give you the best deep sky views of nebulae through all telescopes. Manufactured with high
quality glass this filter will bring you amazing views of all emission nebulae. With ultra high light transmission, stars appear sharp and clear. The UHC Filter blocks most wavelengths of light pollution and is able to bring the detail out in the dark sky. Passes the Hydrogen-beta and oxygen III lines of the spectrum so that nebulae are bright but the sky's background is reduced by over 90%, delivering great contrast and making nebulae jump out of the background sky. This one filter is highly recommended for general use. If you only get one filter for your scope, this is the one you should get.