JMI - RCF Base Plate

The Reverse Crayford Focuser (RCF) is a light-weight, low-profile focuser with a new revolutionary design - JMI′s low-cost,
high-quality answer to plastic focusers. The reverse Crayford design gives zero image shift and zero backlash. (U.S. Patent No.
6,297,917)

All RCF focusers can be purchased with either a flat base or curved base (specify RCF model and ″flat″ or
″curved″ base).  The standard radius on a 1.25″ RCF curved base is 3.75″ (7.5″ diameter). The
2″ RCF has a standard radius of 10″ (20″ diameter) and an optional radius of 5″ (10″ diameter).