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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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Original price CA$279.00 - Original price CA$279.00
Original price
CA$279.00
CA$279.00 - CA$279.00
Current price CA$279.00

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...

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Original price CA$279.00 - Original price CA$279.00
Original price
CA$279.00
CA$279.00 - CA$279.00
Current price CA$279.00
Original price CA$648.00 - Original price CA$648.00
Original price
CA$648.00
CA$648.00 - CA$648.00
Current price CA$648.00

Baader 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...

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Original price CA$648.00 - Original price CA$648.00
Original price
CA$648.00
CA$648.00 - CA$648.00
Current price CA$648.00
Original price CA$401.00 - Original price CA$401.00
Original price
CA$401.00
CA$401.00 - CA$401.00
Current price CA$401.00

Baader 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...

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Original price CA$401.00 - Original price CA$401.00
Original price
CA$401.00
CA$401.00 - CA$401.00
Current price CA$401.00
Original price CA$969.00 - Original price CA$969.00
Original price
CA$969.00
CA$969.00 - CA$969.00
Current price CA$969.00

Baader 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 ...

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Original price CA$969.00 - Original price CA$969.00
Original price
CA$969.00
CA$969.00 - CA$969.00
Current price CA$969.00
Original price CA$361.00 - Original price CA$361.00
Original price
CA$361.00
CA$361.00 - CA$361.00
Current price CA$361.00

Celestron 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...

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Original price CA$361.00 - Original price CA$361.00
Original price
CA$361.00
CA$361.00 - CA$361.00
Current price CA$361.00
Original price CA$279.00 - Original price CA$279.00
Original price
CA$279.00
CA$279.00 - CA$279.00
Current price CA$279.00

iOptron 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...

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Original price CA$279.00 - Original price CA$279.00
Original price
CA$279.00
CA$279.00 - CA$279.00
Current price CA$279.00
Original price CA$643.00 - Original price CA$643.00
Original price
CA$643.00
CA$643.00 - CA$643.00
Current price CA$643.00

iOptron 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...

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Original price CA$643.00 - Original price CA$643.00
Original price
CA$643.00
CA$643.00 - CA$643.00
Current price CA$643.00
Original price CA$755.00 - Original price CA$755.00
Original price
CA$755.00
CA$755.00 - CA$755.00
Current price CA$755.00

iOptron 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...

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Original price CA$755.00 - Original price CA$755.00
Original price
CA$755.00
CA$755.00 - CA$755.00
Current price CA$755.00
Original price CA$5,033.00 - Original price CA$5,033.00
Original price
CA$5,033.00
CA$5,033.00 - CA$5,033.00
Current price CA$5,033.00

Optec 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...

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Original price CA$5,033.00 - Original price CA$5,033.00
Original price
CA$5,033.00
CA$5,033.00 - CA$5,033.00
Current price CA$5,033.00
Original price CA$1,813.00 - Original price CA$2,093.00
Original price
CA$1,813.00 - CA$2,093.00
CA$1,813.00 - CA$2,093.00
Current price CA$1,813.00

Optec 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) ...

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Original price CA$1,813.00 - Original price CA$2,093.00
Original price
CA$1,813.00 - CA$2,093.00
CA$1,813.00 - CA$2,093.00
Current price CA$1,813.00
Original price CA$287.00 - Original price CA$287.00
Original price
CA$287.00
CA$287.00 - CA$287.00
Current price CA$287.00

Pegasus 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...

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Original price CA$287.00 - Original price CA$287.00
Original price
CA$287.00
CA$287.00 - CA$287.00
Current price CA$287.00
Original price CA$231.00 - Original price CA$231.00
Original price
CA$231.00
CA$231.00 - CA$231.00
Current price CA$231.00

Pegasus 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...

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Original price CA$231.00 - Original price CA$231.00
Original price
CA$231.00
CA$231.00 - CA$231.00
Current price CA$231.00
Original price CA$119.00 - Original price CA$119.00
Original price
CA$119.00
CA$119.00 - CA$119.00
Current price CA$119.00

Pegasus 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...

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Original price CA$119.00 - Original price CA$119.00
Original price
CA$119.00
CA$119.00 - CA$119.00
Current price CA$119.00
Original price CA$129.00 - Original price CA$129.00
Original price
CA$129.00
CA$129.00 - CA$129.00
Current price CA$129.00

Pegasus 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...

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Original price CA$129.00 - Original price CA$129.00
Original price
CA$129.00
CA$129.00 - CA$129.00
Current price CA$129.00
Original price CA$392.00 - Original price CA$392.00
Original price
CA$392.00
CA$392.00 - CA$392.00
Current price CA$392.00

Pegasus 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...

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Original price CA$392.00 - Original price CA$392.00
Original price
CA$392.00
CA$392.00 - CA$392.00
Current price CA$392.00
Original price CA$101.00 - Original price CA$101.00
Original price
CA$101.00
CA$101.00 - CA$101.00
Current price CA$101.00

Pegasus 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...

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Original price CA$101.00 - Original price CA$101.00
Original price
CA$101.00
CA$101.00 - CA$101.00
Current price CA$101.00
Original price CA$140.00 - Original price CA$140.00
Original price
CA$140.00
CA$140.00 - CA$140.00
Current price CA$140.00

Pegasus 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 ...

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Original price CA$140.00 - Original price CA$140.00
Original price
CA$140.00
CA$140.00 - CA$140.00
Current price CA$140.00
Original price CA$196.00 - Original price CA$196.00
Original price
CA$196.00
CA$196.00 - CA$196.00
Current price CA$196.00

Pegasus 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...

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Original price CA$196.00 - Original price CA$196.00
Original price
CA$196.00
CA$196.00 - CA$196.00
Current price CA$196.00
Original price CA$1,987.00 - Original price CA$1,987.00
Original price
CA$1,987.00
CA$1,987.00 - CA$1,987.00
Current price CA$1,987.00

PrimaLuceLab 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...

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Original price CA$1,987.00 - Original price CA$1,987.00
Original price
CA$1,987.00
CA$1,987.00 - CA$1,987.00
Current price CA$1,987.00
Original price CA$2,331.00 - Original price CA$2,331.00
Original price
CA$2,331.00
CA$2,331.00 - CA$2,331.00
Current price CA$2,331.00

PrimaLuceLab 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 ...

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Original price CA$2,331.00 - Original price CA$2,331.00
Original price
CA$2,331.00
CA$2,331.00 - CA$2,331.00
Current price CA$2,331.00
Original price CA$1,225.00 - Original price CA$1,225.00
Original price
CA$1,225.00
CA$1,225.00 - CA$1,225.00
Current price CA$1,225.00

PrimaLuceLab 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...

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Original price CA$1,225.00 - Original price CA$1,225.00
Original price
CA$1,225.00
CA$1,225.00 - CA$1,225.00
Current price CA$1,225.00
Original price CA$1,225.00 - Original price CA$1,225.00
Original price
CA$1,225.00
CA$1,225.00 - CA$1,225.00
Current price CA$1,225.00

PrimaLuceLab 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 ...

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Original price CA$1,225.00 - Original price CA$1,225.00
Original price
CA$1,225.00
CA$1,225.00 - CA$1,225.00
Current price CA$1,225.00
Original price CA$945.00 - Original price CA$945.00
Original price
CA$945.00
CA$945.00 - CA$945.00
Current price CA$945.00

PrimaLuceLab ESATTO 2" Robotic microFocuser

Robotic microfocuser with integrated motor and controller 67 mm body length, ideal for SCT and EdgeHD telescopes Crayford-style mechanism with a 5...

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Original price CA$945.00 - Original price CA$945.00
Original price
CA$945.00
CA$945.00 - CA$945.00
Current price CA$945.00
Original price CA$3,269.00 - Original price CA$3,269.00
Original price
CA$3,269.00
CA$3,269.00 - CA$3,269.00
Current price CA$3,269.00

PrimaLuceLab 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...

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Original price CA$3,269.00 - Original price CA$3,269.00
Original price
CA$3,269.00
CA$3,269.00 - CA$3,269.00
Current price CA$3,269.00

Motor 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.