This "handy" stepper motor unit only operates with the Focuser Boss II electronic focuser. Its housing design allows for manual focus knob adjustment by merely turning the over-ride knob. Integrated temperature thermistor permits temperature command via the Focuser Boss II digital system.
This model fits 2.0", 2.5", and 3.0" Feather Touch rack & pinion focusers as well as the 2.7" Astro-Physics focuser with Feather Touch upgrade.
Starlight Instruments Product Number: HSM30