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Celestron Focus Motor for SCT and EdgeHD and RASA

Celestron Focus Motor for SCT and EdgeHD and RASA
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Celestron Focus Motor for SCT and EdgeHD and RASACelestron Focus Motor for SCT and EdgeHD and RASACelestron Focus Motor for SCT and EdgeHD and RASACelestron Focus Motor for SCT and EdgeHD and RASA
Price:  £189.00
List Price:  £199.00
(Inc. 20% VAT)
+

Product Code:  94155
Manufacturer:  Celestron

Celestron


Celestron’s Focus Motor is an electronic focuser for use with Celestron Schmidt-Cassegrain (SCT), EdgeHD and Rowe-Ackermann Schmidt Astrograph (RASA) telescope optical tubes. With this focus motor unit installed, celestial objects can be brought into sharp, precise focus using your telescope’s hand controller or a computer. This unit replaces the existing manual focuser knob on your telescope.

A focus motor is great for both visual observers who want to obtain exact focus (especially those with dexterity issues) without requiring to physically touch the telescope. Furthermore, this is a must-have accessory for astroimagers since they no longer need to be physically near the telescope to focus an image and also there is no need to touch the telescope (causing it to “shake” during focusing). Combined with computerised control of the mount and camera, the focus motor enables the imager to gather data remotely from a backyard observatory, or even a telescope located hundreds of miles away.

This electronic focuser will fit the following OTA’s produced after 2006 (not compatible with older models or 5” SCTs):

  • 6-14″ SCT optical tubes
  • 8-14″ EdgeHD optical tubes (exc. 925 Edge HD)
  • 8” Rowe-Ackermann Schmidt Astrograph (RASA)
  • 36cm Rowe-Ackermann Schmidt Astrograph (RASA)
  • 11” RASA, but requires the Focuser Retrofit Kit for RASA 11.

Power/Control Options

There are three options for powering and controlling your Celestron Focus Motor:

  • When using a Celestron computerised mount, you can power and control the focus motor through the mount using the supplied AUX cable. This allows control from the mount’s hand controller (NexStar or StarSense) or a computer.
  • If you are not using a Celestron mount, you can power and control the focus motor from a computer USB port. A user supplied USB A-to-B cable is required.
  • You may also opt to use an external 12V DC power source which plugs into the motor’s power jack.

Software

Celestron offers a free Focuser Utility program for computer control of the focuser. The Celestron PWI software can also control the focus motor.

The utility program can give the following functionality:

  • multiple speed rates for focus motor control
  • move focuser in/out
  • automatic GoTo indexed focuser position
  • focuser backlash compensation

SPECIFICATIONS:

  • Motor: DC servo motor
  • Spur gears: Brass, 1:1 gear ratio, 38mm diameter, 45 teeth
  • Focuser shaft coupler: Aluminum clamping sleeve
  • Microprocessor: NXP Kinetis series, Arm Coretex-M4 core
  • AUX port power: Powered by Celestron computerized mount AUX port, connecting cable supplied
  • USB port power: USB3 or USB2 providing at least 900mA
  • DC jack power: 12V DC, 1A, 5.5mm/2.1mm tip positive plug
  • Compatibility: All SCTs produced after 2006 except 5" SCT, all Edge HD, RASA 8", RASA 36cm, 7" Mak-Cass
  • Speed rates: 8°/sec , 32°/sec , 128°/sec

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