Baader Orange 570nm Long-Pass Filter - Round Mounted - FCFO- 2"/1.25" Eyepieces Eliminates the color error present

Eliminates the color error present in economy refractors

Focal Length: 17

Optical Coatings: Fully Multi-Coated

Celestron Regal M2 80ED Zoom Spotting Scope Features

Focuser: Course focus

Baader Orange 570nm Long-Pass Filter - Round Mounted - FCFO- 2"/1.25" Eyepieces Eliminates the color error presentAbout the Baader Orange 570nm 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 Orange 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.