Baader Yellow 495nm Long-Pass Filter - Round Mounted - FCFY- William Optics Accessories Both a T-Adapter and T-Ring

Both a T-Adapter and T-Ring are required to mount a 35mm SLR camera to your instrument

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

Celestron UHC/LPR Filter - 2" Specifications

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 Both a T-Adapter and T-RingAbout 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.