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Celestron Focus Motor
Celestron Focus Motor
Celestron Focus Motor
Celestron Focus Motor
Celestron Focus Motor
Celestron Focus Motor
Celestron Focus Motor
Celestron Focus Motor

Celestron Focus Motor

by Celestron
SKU CEL-94155-A
$260.00 - $260.00
$260.00
$260.00 - $260.00
$260.00
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  • Adds precise, hands-free electronic focusing to Celestron SCT, EdgeHD, and RASA telescopes
  • DC servo motor provides 1000 steps per revolution for fine focus control
  • Three power options: Celestron mount AUX port, computer USB, or external 12V DC
  • Control via NexStar+ hand controller or computer with Celestron software and ASCOM drivers
  • Compatible with all Celestron SCTs (6" to 14") made since 2006
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Celestron Focus Motor

    The Celestron Focus Motor adds precise electronic focus control to your telescope, weighing just 15 oz (.42 kg). Its DC servo motor and brass spur gears deliver three distinct slew speeds up to 128°/sec for rapid adjustments. With a resolution of 1000 steps per revolution, you can achieve critical focus for imaging or visual use without introducing vibration by touching the knob.

    Precision Focusing with a 1000-Step DC Servo Motor

    At the core of the Celestron Focus Motor is a responsive DC servo motor paired with robust, 35.2mm brass spur gears in a 1:1 ratio. This direct-drive design translates into zero-backlash focusing and ensures the motor's 1000 discrete steps per revolution correspond directly to focuser movement. This level of resolution is critical for astrophotography, allowing you to make minute adjustments to achieve perfectly sharp stars, far beyond what is possible by hand.

    For visual observers, the motor eliminates image shake when focusing at high magnification, making it easier to see fine detail on planets like Jupiter or the Moon. The aluminum clamping sleeve provides a secure, non-slip connection to the telescope's focus shaft, ensuring repeatable and reliable performance session after session.

    3 Ways to Power: AUX, USB, and 12V DC

    The Focus Motor offers three distinct power and control pathways to integrate into any setup. If you use a Celestron computerized mount, simply connect the motor to an open AUX port with the supplied cable for a fully integrated solution controlled by your NexStar+ or StarSense hand controller. This is the simplest option for visual observers and those with all-Celestron setups.

    For imagers using non-Celestron mounts or custom setups, the motor can be powered and controlled directly from a computer via its USB port, which requires at least 900mA from a USB2 or USB3 source. For permanent observatory installations, a dedicated 12V DC power jack provides the most stable power source, ensuring the motor is always ready for remote operation.

    Remote Control with Celestron PWI and ASCOM

    A motorized focuser is essential for remote astrophotography, and the Celestron Focus Motor is built for software control. Celestron provides a free Focuser Utility program for direct computer control, and it fully integrates with the comprehensive Celestron PWI Telescope Control Software. This allows you to manage focusing alongside your mount and camera from a single application.

    For maximum compatibility with the wider astronomy ecosystem, the Focus Motor is supported by a dedicated ASCOM driver. This enables control from popular third-party imaging suites like N.I.N.A., Sequence Generator Pro, and Maxim DL, allowing you to incorporate automated focusing routines into your imaging plans for a completely remote, hands-off observatory.

  • Is the Celestron Focus Motor compatible with my older orange-tube C8?

    No, the Focus Motor is only compatible with Schmidt-Cassegrain Telescopes (SCTs) manufactured since 2006. It is not compatible with older models, including the 5" SCT.

    How do I power the Celestron Focus Motor if I don't have a Celestron mount?

    You have two options. You can power and control it from a computer using a standard USB A-to-B cable (not included), provided the port can supply at least 900mA. Alternatively, you can use a separate 12V DC, 1A power supply, which is ideal for a permanent observatory setup.

    Can I use the Celestron Focus Motor with my 6” SCT and an Off-Axis Guider?

    No. For the 6” Schmidt-Cassegrain telescope specifically, Celestron's Off-Axis Guider (#93648) cannot be used at the same time as the focus motor due to mechanical interference between the two accessories on the rear cell.

    What do the different speed rates on the Celestron Focus Motor do?

    The three speed rates (8°/sec, 32°/sec, 128°/sec) allow you to choose the right balance of speed and precision. The fastest rate is for making large focus changes quickly, while the slowest rate provides the finest control for nailing critical focus when imaging or observing at high power.

    What software do I need to control the Celestron Focus Motor from my computer?

    You can use Celestron's free Focuser Utility or Celestron PWI software for native control. For use with third-party software like N.I.N.A. or Sequence Generator Pro, you will need to install the Celestron ASCOM driver, which is available for download from Celestron's website.

    Can I still use the manual focus knob after installing the Celestron Focus Motor?

    No, the focus motor attaches directly to the focuser shaft, replacing the manual knob. All focusing is then done electronically through the hand controller or a computer. The motor provides much finer control than is possible by hand, eliminating image shake.

  • Motor Type DC servo motor
    Gears Brass, 1:1 gear ratio, 35.2mm diameter, 42 teeth
    Focuser Shaft Coupler Aluminum clamping sleeve
    Microprocessor NXP Kinetis series, Arm Coretex-M4 core
    Steps per Revolution 1000
    Slew Speeds 8°/sec, 32°/sec, 128°/sec
    Power (AUX Port) Via Celestron computerized mount AUX port
    Power (USB Port) USB2 or USB3, requires minimum 900mA
    Power (DC Jack) 12V DC, 1A, 5.5mm/2.1mm tip positive plug
    Compatibility All SCTs (2006+ except 5"), all EdgeHD, RASA 8", RASA 36cm, 7" Mak-Cass
    Weight 15 oz (0.42 kg)
    Warranty 2-Year Warranty

    • Focus Motor

      × 1

    • AUX Port Connecting Cable

      × 1

    • Tethered Port Covers

      × 1

  • Celestron 2-Year Limited Warranty