RSF-10 Secondary Mirror Motor Focuser for RC Telescopes

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RSF-10 Secondary Mirror Motor Focuser for RC Telescopes


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Out of Stock (Can be Backordered)

The RSF-10 Secondary Mirror Motor Focuser for 10 inch RC Telescopes is a DIY upgrade kit for RC Telescope with standard Crayford focusers.

All professional grade RC telescopes use secondary mirror focusers to achieve precise focus while eliminating focuser tilt. With a secondary mirror focuser the camera and optical train can be fixed in position with the Optional RSF-10/12 Fixed Camera Adapter. Heavy camera systems will no longer cause the focuser drawtube to sag under the weight.

The RSF Series focusers can be easily mounted without damaging your telescope. The original location of the secondary is maintained and the optical axis can be easily readjusted after mounting the motor focuser.

The RSF Series ASCOM driver allows convenient and precise focus control using your favourite image capture software.



Secondary Mirror Focus Control.

RFS10 on GSO RC10A

RFS10 on GSO RC10A

You can also lock the focal plane to prevent image shift.


Home & Temperature Sensor

A home sensor is built in to find the mechanical reference point of the focuser. The hand controller has a built-in sensor to measure the ambient temperature.

Hand Controller

Hand Controller

Hand Controller

Hand controller is provided as standard, so you can use it without PC. The moving speed can be selected and fine adjustment is possible.

Hand Controller Connections

Hand Controller Connections

Support various software environment

You can use the RSF controller application on your PC via a USB connection (for Windows). Support ASCOM Platform 6.4.

Ascom Support

Ascom Support

Easily DIY Kit to Build

All components are provided for direct mounting, so anyone can easily install it if you refer only to the installation manual.

DIY Kit Components

DIY Kit Components




Type: Secondary mirror moving focuser

Motor: Stepper motor

Focusing stroke: +/- 8mm (at focal plane +-/48mm)

Minimum step: 0.01mm (at focal plane 0.06mm)

Operating temp: -20°C ~ 40°C

Power: DC 12V

Control: Hand controller, Program, ASCOM driver

Size: Diameter 75mm, Height 82mm(zero position)

Suitable OTA: RC 10″ (GSO, Astro-Tech, TPO, Teleskop Service)

Weight: 560g (Focuser body)

    Need Some Help?

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