Starlight Instruments Stepper Motor

No, the manual override is integrated directly into the design. You can make tactile adjustments at any time without needing to disengage the motor or alter your digital settings.

The thermistor monitors environmental temperature changes in real-time, allowing your focusing system to automatically compensate for thermal expansion or contraction in the telescope tube. This ensures your focus remains sharp throughout long imaging sessions.

This unit is specifically designed for integration with Feather Touch focusers. It is also fully compatible with the Focuser Boss II and SI-EFS digital focusing systems.

The correct size depends on your specific focuser model. You should select the HSM20 (1 inch), HSM30 (1.33 inch), or HSM35 (1.46 inch) based on the physical dimensions required by your existing Feather Touch focuser.

It is excellent for both. While it provides the high-resolution stepping necessary for precise astrophotography, the manual override knob makes it equally useful for visual observers who want the convenience of electronic focusing without losing the tactile feel of traditional knobs.