The RSF-12 Secondary Mirror Motor Focuser for 12 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.

Features

Secondary Mirror Focus Control. 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 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

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.

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.

Specifications

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 12″ (GSO, Astro-Tech, TPO, Teleskop Service)

Weight: 560g (Focuser body)