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JMI - RCF Drawtube Upgrades


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Availability: Available - Ships in 3-5 Days


Available - Ships in 3-5 Days

Manufactured by: Jims Mobile, Inc. (JMI)


RCF focusers come standard with a 3″ length drawtube. The following part number is for upgrading the drawtube length to 4.6″ at the time of purchase of an RCF focuser.

Product Series

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)

Additional Information

Name JMI - RCF Drawtube Upgrades
Manufacturer Jims Mobile, Inc. (JMI)
Manufacturer Part No RCFDTUPGRADE