User manual ORION TELESCOPES & BINOCULARS VBLOCK FILTER

[. . . ] V-Block Filter #5595, 1. 25" version #5597, 2" version The Orion V-Block filter allows you to observe bright objects with refracting telescopes without the annoying effects of chromatic aberration. Whenever light passes through one material to another, light of different wavelengths (color) is bent by different amounts. [. . . ] Using the V-block Filter To use the V-block filter you will need to thread it into a 1. 25" (#5595) or 2" (#5597) eyepiece that can accept threaded filters. Simply thread the filter into the eyepiece barrel until it is finger tight. You may also "stack" filters by threading another filter into the bottom of the first. After threading the filter into the eyepiece, place the eyepiece into the telescope and bring it into focus. You should now be able to observe without the effects of chromatic aberration. Be aware, however, that the filter imparts a slight yellow-green tint to objects. The filter was designed with the overall color balance in mind, so the bit of added tint should not detract from the view. The V-block filter should only be used when observing bright objects, such as the Moon, the bright planets (Venus, Mars, Jupiter, and Saturn) or bright stars. The V-block will not have any effect when observing faint objects, such as deep sky objects, because they do not emit enough light to cause visible chromatic aberration. Cleaning and Maintenance When not in use, the V-block filter should be kept in its original padded case. [. . . ] Wipe the lens gently in a circular motion, then remove any excess fluid with a fresh lens tissue. Use caution; rubbing too hard may scratch the glass. V-Block Transmission Spectrum violet blue green yellow orange red Customer Support (800) 676-1343 Email: support@telescope. com Providing Exceptional Consumer Optical Products Since 1975 Corporate Offices (831) 763-7000 P. O. [. . . ]