Jims Mobile, Inc. (JMI) - Digital Focus Counter for Celestron SCTs

What is a Digital Focus Counter?

The Digital Focus Counter is a low-cost mechanical alternative to the electronic DRO. The
three-digit counter display allows 10 turns of the shaft before returning to zero. If you want
focusing repeatability with an NGF focuser, SCT (Schmidt-Cassegrain Telescope) manual focus or
MOTOFOCUS, this unit will do the job. It is available for all NGF focusers (both manual and
motorized versions), as a manual unit which replaces the focus knob on 8″ or larger SCTs
(not recommended for CCD imaging due to space limitations and problems with image shift) and as a
piggy-back option for most MOTOFOCUS units. (The piggy-back option is available only at the time
of purchase of a new MOTOFOCUS unit and cannot be added later.).

	

DFC for Celestron SCTs

Celestron early C5 (dual fork arm), C5 / C5+ (single fork arm), C5-S, C5-SGT, C8, C8+, C8-S,
C8-SGT, C11, C14, Celestar 8, Celestar 8 Deluxe, CG-11, CG-14, CGE 1100, CGE 1400, Classic 8,
CM-1100, CM-1400, Fastar 8, G-5, G-8, Great Polaris C8, NexStar 8 GPS, NexStar 11 GPS, Polaris
C8, Powerstar 8, Super C8, Super C8+, Super Polaris C8, Ultima 8 / 11

Manual version which replaces the focus knob of the Celestron 8″ or larger SCT. (Specify
telescope make, model and year.)