Baader Yellow 495nm Long-Pass Filter - Round Mounted - FCFY- William Optics Accessories 25" Barrel Configuration with all

25" Barrel Configuration with all Baader Hyperion Clickstop Zooms (MkI - MkIII)

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

Drawtube/Focuser: 2

Weight: 5lbs

Baader Yellow 495nm Long-Pass Filter - Round Mounted - FCFY- William Optics Accessories 25" Barrel Configuration with allAbout 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.