Baader Yellow 495nm Long-Pass Filter - Round Mounted - FCFY- William Optics Accessories David and I were discussing

David and I were discussing characteristics we''d like in a superior "planetary" TeleVue Telescope Eyepiece

Universal AC adapter included

Tele Vue offers the largest

Advanced technology coatings enable the filter to achieve an outstanding transmission of over 97% across the entire bandpass

Have you ever wished your 2" eyepiece barrel was just a little longer

Baader Yellow 495nm Long-Pass Filter - Round Mounted - FCFY- William Optics Accessories David and I were discussingAbout 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.