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Each Baader Planetarium IR-Pass Filter substrate is fine-optically polished plane parallel for 1/4 wavefront over entire surface
god of light
the new Celestron NexStar SE Computer Telescope Family combines the classic heritage of the original orange tube Celestron Telescopes with state-of-the-art features including a fully computerized operating system
Paul Dellechiaie was tasked to investigate a long eye-relief eyepiece design in the 70 degree AFOV range
" leaving the impact of "spacewalk" viewing
Baader Yellow 495nm Long-Pass Filter - Round Mounted - FCFY- Size:2" Each Baader Planetarium IR-Pass FilterAbout the Baader Yellow 495nm Long Pass Filter Round Mounted Baader Planetarium astronomy filters by far supersede the mediocre quality of common "flame polished" color filters. A fine optical polish and 2 mm thick glass allows the Baader Yellow Filter to be inserted anywhere into the optical path without introducing astigmatism or other defects. For instance, they can be used in front of a binocular viewer without degrading the image in any way.
