Baader Contrast Booster Filter - Round Mounted - FCB- Size:2" because the design is impractical

because the design is impractical

Diffraction limited "on-axis" performance is a given

9 x 2 in (135 x 126 x 52 mm) in (135 mm)

Celestron Product Number: 71256

Typical telescope eyepieces used with fast Newtonians can have field stop locations differing by as much as half an inch

Baader Contrast Booster Filter - Round Mounted - FCB- Size:2" because the design is impracticalChoose either the Baader 1. 25" or 2" Round Mounted Filter from the dropdown About the Baader Contrast Booster Filter The Baader Contrast Booster Filter is much more than a simple minus violet filter. Based on the popular Baader Moon & Skyglow filter, the Baader Contrast Booster takes contrast enhancement and skyglow reduction to the maximum level possible from a filter. Not only does this filter deliver a significant enhancement to planetary and