Celestron Focus Motor A for SCT and EdgeHD Telescopes

Brand: Celestron

SKU : CE-94155-A

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  • Enables electronic focusing. 
  • Self-powering.
  • Compatible with most Celestron Schmidt-Cassegrain, EdgeHD, and Rowe-Ackermann Schmidt Astrograph optical tubes.
  • Motor controls include multiple speed rates, automatic GoTo indexed focuser position, and focuser backlash compensation.
  • Focuser Utility software.
  • Enables auto-focusing with a camera and third-party software via ASCOM.
  • Indexed focus position.


Product Details

  • This Focus Motor is designed for Celestron Schmidt-Cassegrain (SCT) and EdgeHD telescope optical tube assemblies.

    When this focus motor is installed, you will be able to bring celestial objects into sharp, precise focus using your telescope's hand controller or a computer instead of using the focuser knob.

    A focus motor is great for visual observers who want to dial in exact focus (especially those with dexterity issues), and a must-have accessory for astro-imagers. With a motorized focuser installed, an astro-imager no longer needs to be physically near the telescope to focus an image. Combined with computerized control of the mount and camera, the focus motor enables the imager to gather data remotely from a telescope right outdoors or one located in a remote observatory where they have control.

    As an added bonus, port covers protect the ports while they are not in use, and the covers cannot be lost due to a tethered design.

    Compatible Optical TubesCelestron Focus Motor -for SCT and EdgeHD Telescopes-BACK

    The focus motor is compatible with:
    • SCTs from 6-inch to 14-inch in aperture that have been produced since the year 2006.
    • 8-inch Rowe-Ackermann Schmidt Astrograph (RASA).
    • 36 cm RASA.
    • 7-inch Maksutov-Cassegrain.
    • All of the EdgeHD optical tubes (Now including the 9.25-inch).
    • 11-inch RASA - but requires the Focuser Retrofit Kit.   

     It is not compatible with:

    • 5-inch SCTs or older models.
    • For 6-inch Schmidt-Cassegrain telescopes only - the Off-Axis Guider (#93648) cannot be used when the focus motor is installed due to mechanical interferences.


    Power Options

    There are three options for powering your Celestron Focus Motor:
    • When using a Celestron computerized 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. You will need a user-supplied USB A-to-B cable.
    • You may also opt to use an external 12V DC power source which plugs into the motor’s power jack. Compatible Software Celestron offers a free Focuser Utility program for computer control. The Celestron PWI software can also control the focus motor. To use third-party focuser control software, an ASCOM driver is needed.


  • specifications

    AUX Port PowerCelestron computerized mount AUX port/ connecting cable supplied
    CD Jack Power12V DC 1A/ 5.5mm/ 2.1 mm tip positive plug
    Focuser ShaftCoupler/ Aluminum clamping sleeve
    Focuser Steps per Revolution1000 steps
    Free ShippingYes
    Gear Diameter35.2mm
    Gear Ratio1:1
    Gear Teeth42
    Gear TypeSpur/ Brass
    MicroprocessorNXP Kinetics serice/ Arm coretex~M4 core
    Motor Speed Rates8/32/ and 128 degrees per second
    Motor TypeDC servo motor
    USB Port PowerUSB3 or USB2 with at lease 900 mA
    Weight15 ounces (0.42 kg)
  • included items

    .Celestron Focus Motor -for SCT and EdgeHD Telescopes-8-INCLUDED 

    • Motor:  DC servo motor.
    • Spur gears:  Brass, 1:1 gear ratio, 35.2 mm diameter, 42 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 900 mA.
    • DC jack power:  12V DC, 1A, 5.5 mm/ 2.1 mm tip positive plug.


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