Aperture |
Celestron Telescope Design |
Models |
Compatible with #94155 Focus Motor? |
Notes |
5” | Schmidt-Cassegrain | All | No | |
6” | Schmidt-Cassegrain | All | Yes | Not compatible with #93648 Off-Axis Guider |
7” | Maksutov-Cassegrain | All | Yes | |
8” | Schmidt-Cassegrain | Built before 2006 | No | |
8” | Schmidt-Cassegrain | Built 2006 or later | Yes | |
8” | EdgeHD | All | Yes | |
8” | Rowe-Ackermann Schmidt Astrograph | All | Yes | |
9.25” | Schmidt-Cassegrain | Built before 2006 | No | |
9.25” | Schmidt-Cassegrain | Built 2006 or later | Yes | |
9.25” | EdgeHD | All | Yes | |
11” | Schmidt-Cassegrain | Built before 2006 | No | |
11” | Schmidt-Cassegrain | Built 2006 or later | Yes | |
11” | EdgeHD | All | Yes | |
11” | Rowe-Ackermann Schmidt Astrograph | All | Yes | The RASA 11 (91075) is compatible with the #94155-A focus motor, but requires the #94255 retrofit kit. The RASA 11 V2 (91076) is compatible with the #94155-A without a retrofit kit needed. |
14” | Schmidt-Cassegrain | Built before 2006 | No | |
14” | Schmidt-Cassegrain | Built 2006 or later | Yes | |
14” | EdgeHD | All | Yes | |
36cm | Rowe-Ackermann Schmidt Astrograph | All | Yes |
Celestron Focus Motor
The Celestron Focus Motor enables electronic focusing for easy, hands-free observing.
- Controlled via a Celestron Hand Controller or Computer (Laptop / PC)
- Self-Powering via Mount or PC (USB)
- Compatible with SCTs, EdgeHD & RASA Telescopes
- Control Mount Speed, Automatic GoTo Indexed Focuser Position & Focuser Backlash Compensation
- Use Focuser Utility Software for Windows or CPWI
- Capable of Auto-Focusing with a Camera or Third-Party Software Such as ASCOM
- Indexed Focus Position Returns Motor to Previous Position
- Celestron 2 Year Warranty
Shipping Calculator
Elevate your astrophotography experience with the Celestron Focus Motor.
The Celestron Focus Motor provides electronic focusing for your Celestron Schmidt-Cassegrain (SCT), EdgeHD and RASA telescope optical tubes. Say goodbye to manual focusing, and welcome the precision and convenience that the Celestron Focus Motor brings to your celestial pursuits.
Precise electronic focusing.
Imagine achieving pinpoint focus on celestial objects with ease. The Celestron Focus Motor lets you do just that. Whether you're a visual observer seeking that perfect focus or an avid astroimager striving for impeccable clarity, this motorised focuser is a game-changer. Say goodbye to the challenges of manually adjusting your focuser knob, especially if you have dexterity issues.
Astroimaging from anywhere.
For astrophotographers, the Celestron Focus Motor is a must-have accessory. With this motor installed, you no longer need to be near your telescope to achieve precise focus. Pair it with computerised control of your mount and camera, and you can gather data remotely from the comfort of your backyard observatory or a telescope located miles away. It's a game-changer for those who want to capture stunning images without being tied to their equipment.
Power Options
Celestron Computerised Mount: Use the supplied AUX cable to power and control the Focus Motor through the mount itself. This allows for easy control from your mount's hand controller (NexStar+ or StarSense) or your computer.
Computer USB Port: If you're not using a Celestron mount, simply connect the Focus Motor to your computer's USB port using a user-supplied USB A-to-B cable.
External 12V DC Power: Alternatively, you can opt for an external 12V DC power source that plugs into the motor's power jack for added flexibility.
Software Integration
To enhance your experience further, Celestron offers a free Focuser Utility program for computer control. Additionally, the Celestron PWI (CPWI) software is fully compatible with the focus motor. If you prefer third-party focuser control software, you'll be pleased to know that an ASCOM driver is also available.
Telescope Compatibility
The Celestron Focus Motor is compatible with a wide range of optical tubes. It works flawlessly with all SCTs from 6" to 14" in aperture produced since 2006, as well as the 8" Rowe-Ackermann Schmidt Astrograph (RASA), the 36cm RASA, the 7" Maksutov-Cassegrain, and all EdgeHD optical tubes. Even the RASA 11 (91075) is compatible with the #94155-A focus motor, with the option of a Focuser Retrofit Kit for RASA 11 for added versatility. This motor is designed to fit seamlessly into your Celestron telescope setup.
Full Specifications
Motor | DC Servo Motor |
Spur Gears | Brass 1:1 Gear Ratio 35.2 Diameter 42 Teeth |
Focuser Shaft Coupler | Aluminium Clamping Sleeve |
Microprocessor | NXP Kinetis Series Arm Coretex-M4 Core |
AUX Port Power | Powered by Celestron Computerised Mount AUX Port (connecting cable supplied) |
USB Port Power | USB 2 or USB 3 (providing at least 900mA) |
DC Jack Power | 12V DC, 1A, 5.5mm (0.21") and 2.1mm (0.08") Tip Positive Plug |
Compatibility | All SCTs Produced After 2006 Except 5" SCT All EdgeHD RASA 8", RASA 36cm 7" Maksutov-Cassegrains |
Speed Rates | 8° / Second 32° / Second 128° / Second |
Focuser Steps Per Revolution | 1000 Steps |
Weight | 420 grams |
About Celestron
Imagine a humble beginning – a 6-inch reflector telescope crafted by Tom Johnson for his young son. This was the spark that ignited a transformative journey. As time passed, his designs evolved into larger, more sophisticated scopes. Today, Celestron shines as an industry trailblazer, renowned for crafting precision optical equipment. From computerised marvels to traditional telescopes, binoculars, spotting scopes and more, Celestron's portfolio is a universe of possibilities. With a legacy spanning over 50 illustrious years, Celestron has earned admiration from both avid hobbyists and dedicated astronomers worldwide. But they don't rest on their laurels; innovation propels them forward. They constantly broaden their product horizons while illuminating minds through global science education initiatives. Celestron's story is one of innovation, evolution and a passion for the cosmos. Join them on this extraordinary journey of discovery and inspiration.
Product Code: 94155-A