Electronic Focusers
An electronic focuser moves the focuser with a stepper motor, under software control. It removes the vibration of touching the telescope, lets you refocus from indoors, and with autofocus routines it keeps the image sharp all night as the temperature drops and the tube contracts. For narrowband and long imaging sessions in Canadian autumn and winter, it is one of the upgrades with the largest effect on image quality.
We carry ZWO EAF, PrimaLuceLab ESATTO and SESTO SENSO, Pegasus Astro FocusCube and Motor Focus Kits, Starlight Instruments motors and Focuser Boss, Baader Steeldrive, iOptron iAFS, Optec, RB Focus, Celestron, QHYCCD and Askar.
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Askar Worm-and-Gear Automatic Telescope Focuser (WAF)
20 kg Equivalent Load Capacity 0.0182° Minimum Resolution Step Size 1:99 Worm-Gear Stepper Motor Native ASCOM Alpaca & Indigo Support 373 g Bo...
View full detailsBaader Planetarium Steeldrive II Controller
Standalone hand controller for Baader Steeldrive II motor units Three distinct, selectable focusing modes for any scenario Full computer control a...
View full detailsBaader Planetarium Steeldrive II Motor Unit
High-torque stepper motor handles heavy imaging loads Timing belt drive eliminates backlash for precise autofocus Contactless homing sensor enable...
View full detailsBaader Steeldrive II Motor Focuser w/ Controller
Handles heavy imaging loads up to 8 kg Achieves a focusing resolution of 2.5µm Backlash-free toothed belt drive system Standalone controller with ...
View full detailsCelestron Focus Motor
Adds precise, hands-free electronic focusing to Celestron SCT, EdgeHD, and RASA telescopes DC servo motor provides 1000 steps per revolution for f...
View full detailsiOptron Electronic Automatic Focuser - iEAF
5 kg Maximum Payload Capacity High-Precision Stepper Motor Drive Built-in Temperature Sensor for Focus Compensation ASCOM Compatible for Automated...
View full detailsiOptron iAFS2 - iOptron 2'' Inline Automatic Focuser
Supports a maximum payload of 5kg without slippage Delivers 0.6µm focusing resolution for critical imaging Features a 51mm clear aperture for full...
View full detailsiOptron iAFS3 - 3-inch Inline Automatic Focuser
3-inch inline auto focuser with iLock™ technology Supports heavy imaging payloads up to 6kg 68mm clear aperture minimizes vignetting Precise 0.4um...
View full detailsOptec Gemini Focusing Rotator
Combines precision focusing and 360° rotation in a single unit Supports heavy imaging payloads up to 10 kg (22 lb) Maintains a 95 mm (3.75 in) cle...
View full detailsOptec TCF-Leo Low Profile Focuser
Consumes only 31.8 mm of back-focus at full retraction Provides 8.9 mm of total travel with 0.08 µm step resolution Supports up to a 9 kg (20 lb) ...
View full detailsPegasus Astro FocusCube 3 Universal
High-torque geared stepper motor with 60N.cm of pull-in torque Lifts imaging payloads up to 6 kg USB-C and 2.4GHz WiFi connectivity for OS-indepen...
View full detailsPegasus Dual Motor Focus Controller
Drives DC motors (up to 1A) and unipolar/bipolar stepper motors (up to 2A) Manual control via digital encoder knob and PC control via USB 2.0 ASCO...
View full detailsPegasus eXternal Motor Controller
Adds a second, high-power motor focus controller to your Pegasus Powerbox Drives demanding bipolar and unipolar stepper motors with up to 2 Amps p...
View full detailsPegasus EZY Focus Hand Controller
Enables precise, vibration-free manual focusing Digital encoder knob with 1:10 fine focus reduction 1.3-inch, 128x64 pixel OLED screen with red fi...
View full detailsPegasus FocusCube Zero - Celestron SCT, EdgeHD & RASA
Standalone focus motor with integrated controller Zero-backlash bipolar stepper motor design Three versions for Celestron 6/8/9.25, 11 and 14 inch...
View full detailsPegasus Hand Controller for FocusCube
Precise, vibration-free manual focusing for the FocusCube v2 Digital rotary encoder with push-button for 1:10 fine focus reduction Allows simultan...
View full detailsPegasus Motor Focus Kit v2 - Universal
Precise 0.06° step size for critical focusing High-torque motor lifts over 6 kg of imaging equipment Universal L-shaped bracket fits a wide range ...
View full detailsPegasus Motor Focus Kit Zero - Celestron SCT, EdgeHD & RASA
Adds automated, zero-backlash focusing to Celestron SCT, EdgeHD, and RASA telescopes Bipolar stepper motor with 1.8° step angle for high-precision...
View full detailsPrimaLuceLab ESATTO 2" Focuser with ARCO 2" Rotator
Combines robotic focuser and high-precision rotator in one unit Low-profile design for minimal back focus consumption Single-cable connection betw...
View full detailsPrimaLuceLab ESATTO 2" LP Focuser with ARCO 2" Rotator
Combines ESATTO 2" LP robotic focuser and ARCO 2" robotic rotator Low-profile design for compact imaging trains Unified power and data connection ...
View full detailsPrimaLuceLab ESATTO 2" LP low profile robotic focuser
Ultra-low 32mm profile designed for low-backfocus telescopes 10mm of precise focuser travel 5 kg (11 lbs) payload capacity for heavy imaging train...
View full detailsPrimaLuceLab ESATTO 2" LP Low Profile Robotic Focuser
32mm thickness for telescopes with limited back-focus Large 50.9mm clear aperture Precise 10mm of focuser travel 0.03 microns per step resolution ...
View full detailsPrimaLuceLab ESATTO 2" Robotic microFocuser
5.0 / 5.0
1 Review
Robotic microfocuser with integrated motor and controller 67 mm body length, ideal for SCT and EdgeHD telescopes Crayford-style mechanism with a 5...
View full detailsPrimaLuceLab ESATTO 3" Focuser with ARCO 3" Rotator
Integrated 3" Robotic Focuser and Rotator Bundle 76.3mm Clear Aperture Through Entire Optical Path 86.5mm Combined Thickness ESATTO Focuser: 8kg P...
View full detailsMotor Kit or Robotic Focuser?
- Motor kits: Attach to your existing focuser knob or shaft with a bracket. Cost-effective, but rely on the original focuser's quality. ZWO EAF, Pegasus FocusCube, SESTO SENSO.
- Robotic focusers: Replace the focuser entirely with a motorized one built for heavy loads. PrimaLuceLab ESATTO, iOptron iAFS, Optec.
- SCT focusers: Either drive the primary mirror knob or add a rear focuser. Mirror locks reduce image shift.
Setting Up Autofocus
- Temperature probe: Lets the software refocus after a set temperature change.
- Filter offsets: Each filter can have its own offset, saving a full autofocus run.
- Backlash: Set backlash compensation once, and autofocus becomes much more reliable.
Electronic Focusers: Frequently Asked Questions
Will an electronic focuser fit my telescope?
Most need a bracket specific to the telescope or focuser. Tell us your model and we will confirm the kit.
Does it work with ASIAIR or NINA?
Most do via ASCOM, INDI or native drivers. ZWO EAF is native in ASIAIR.
Automating your focus?
Send us your telescope and focuser model. We will recommend the motor and the bracket.