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Accessoires de mise au point

A focuser upgrade is often unnecessary. What most drawtubes actually need is a compression ring instead of a set screw, a motor bracket to hold focus through the night, or a reduction knob for fine control — small parts that address the specific fault rather than replacing the whole assembly. David Astro carries focuser accessories in Canada, shipping from Canadian stock.

These parts are highly model-specific. Tell us your focuser make and drawtube diameter and we will identify what fits rather than leaving you comparing photographs.

Filtres

CA$119.00 - CA$119.00
CA$119.00
CA$119.00 - CA$119.00
CA$119.00

Askar AF Kit for FMA180 Pro

ASK-ASKAF180P
1 en stock

Enables Electronic Autofocus on the Askar FMA180 Pro Designed for Seamless Integration with ZWO EAF Broadly Compatible with Most Electronic Focuse...

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CA$119.00 - CA$119.00
CA$119.00
CA$119.00 - CA$119.00
CA$119.00
CA$122.00 - CA$122.00
CA$122.00
CA$122.00 - CA$122.00
CA$122.00

Askar SQA55 Autofocus Kit

ASK-SQA55AFKIT

Designed specifically for the Askar SQA55 Astrograph Enables autofocus with nearly all brands of electronic focusers Includes 4 MXL belts and 2 pu...

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CA$122.00 - CA$122.00
CA$122.00
CA$122.00 - CA$122.00
CA$122.00
Baader Planetarium Adapter S58-short to M54a – for all BDS Diamond Steeltrack®
CA$51.00 - CA$51.00
CA$51.00
CA$51.00 - CA$51.00
CA$51.00

Baader Planetarium Adapter S58-short to M54a – for all BDS Diamond Steeltrack®

BAA-2957209

Adapts the Baader S58 drawtube thread to a female M54a thread Designed for all Baader Diamond Steeltrack® (BDS) focusers Enables direct connection...

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CA$51.00 - CA$51.00
CA$51.00
CA$51.00 - CA$51.00
CA$51.00
Baader Planetarium Adapter S58-short to M68i – for all BDS Diamond Steeltrack®
CA$79.00 - CA$79.00
CA$79.00
CA$79.00 - CA$79.00
CA$79.00

Baader Planetarium Adapter S58-short to M68i – for all BDS Diamond Steeltrack®

BAA-2957207

Adapts the Baader S58 dovetail thread to M68i Provides a secure, rigid M68i female (internal) thread connection Designed for all Baader Diamond St...

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CA$79.00 - CA$79.00
CA$79.00
CA$79.00 - CA$79.00
CA$79.00
Baader Planetarium BDS-SC Adapter S88i to M48i
CA$158.00 - CA$158.00
CA$158.00
CA$158.00 - CA$158.00
CA$158.00

Baader Planetarium BDS-SC Adapter S88i to M48i

BAA-2957297

Connects Baader Diamond Steeltrack SC (BDS-SC) focusers to M48 accessories Provides a standard female M48 (M48x0.75) accessory thread Enables a ri...

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CA$158.00 - CA$158.00
CA$158.00
CA$158.00 - CA$158.00
CA$158.00
Baader Planetarium Steeldrive II Adapter set for FeatherTouch 3.5" focusers
CA$168.00 - CA$168.00
CA$168.00
CA$168.00 - CA$168.00
CA$168.00

Baader Planetarium Steeldrive II Adapter set for FeatherTouch 3.5" focusers

BAA-2957270

Enables motorization of FeatherTouch 3.5" focusers Designed for the Baader Steeldrive II motor Provides a secure, no-slip mechanical coupling Faci...

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CA$168.00 - CA$168.00
CA$168.00
CA$168.00 - CA$168.00
CA$168.00
Baader Planetarium Steeldrive II Belt Cover – 3D-printed
CA$75.00 - CA$75.00
CA$75.00
CA$75.00 - CA$75.00
CA$75.00

Baader Planetarium Steeldrive II Belt Cover – 3D-printed

BAA-2957259

Protects Steeldrive II belt and pulleys Shields drive system from dew, dust, and debris Prevents accidental snags on cables or clothing Custom-des...

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CA$75.00 - CA$75.00
CA$75.00
CA$75.00 - CA$75.00
CA$75.00
Baader Planetarium Baader Steeldrive II Controller
CA$648.00 - CA$648.00
CA$648.00
CA$648.00 - CA$648.00
CA$648.00

Baader Planetarium Steeldrive II Controller

BAA-2957260

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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CA$648.00 - CA$648.00
CA$648.00
CA$648.00 - CA$648.00
CA$648.00
Baader Planetarium Baader Steeldrive II Motor Unit
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00

Baader Planetarium Steeldrive II Motor Unit

BAA-2957265

High-torque stepper motor handles heavy imaging loads Timing belt drive eliminates backlash for precise autofocus Contactless homing sensor enable...

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CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$57.00 - CA$57.00
CA$57.00
CA$57.00 - CA$57.00
CA$57.00

Baader Support du Contrôleur Steeldrive II pour Barre à queue d'aronde 3"

BAA-2957261

Support pour fixer le contrôleur Steeldrive II à une queue d'aronde de 3" Convient à toutes les pinces à queue d'aronde de 3" (Losmandy standar...

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CA$57.00 - CA$57.00
CA$57.00
CA$57.00 - CA$57.00
CA$57.00
CA$107.00 - CA$107.00
CA$107.00
CA$107.00 - CA$107.00
CA$107.00

Baader Anneau Magnétique Steeldrive II pour Capteur de Référence (Homing Sensor)

BAA-2957264

Anneau d'aimant en métal pour le capteur de prise d'origine de Steeldrive II. Compatible avec les porte-oculaires Baader Diamond Steeltrack Si ...

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CA$107.00 - CA$107.00
CA$107.00
CA$107.00 - CA$107.00
CA$107.00
CA$43.00 - CA$43.00
CA$43.00
CA$43.00 - CA$43.00
CA$43.00

Baader Câble Adaptateur Mini DIN/RCA Steeldrive II pour Connecter des Bandes Chauffantes

BAA-2957262

Adaptateur du port Aux du contrôleur Steeldrive II au connecteur de type RCA pour les bandes chauffantes communes jusqu'à 10W. Permet un contrôl...

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CA$43.00 - CA$43.00
CA$43.00
CA$43.00 - CA$43.00
CA$43.00
CA$969.00 - CA$969.00
CA$969.00
CA$969.00 - CA$969.00
CA$969.00

Baader Moteur Steeldrive II avec Contrôleur

BAA-2957165

La NOUVELLE version du moteur SteelDrive II de Baader Planetarium offre un contrôle précis de la mise au point compensée en température pour tous ...

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CA$969.00 - CA$969.00
CA$969.00
CA$969.00 - CA$969.00
CA$969.00
CA$31.00 - CA$31.00
CA$31.00
CA$31.00 - CA$31.00
CA$31.00

Baader Capteur de Température Steeldrive II - 1m

BAA-2957263

Capteur de température avec connecteur et 1Mcable, prend également en charge le contrôle du chauffage du bouclier de rosée. Peut être utilisé a...

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CA$31.00 - CA$31.00
CA$31.00
CA$31.00 - CA$31.00
CA$31.00
CA$31.00 - CA$31.00
CA$31.00
CA$31.00 - CA$31.00
CA$31.00

Baader Capteur de Température Steeldrive II - 1m Plat

BAA-2957263F

Capteur de température pour compenser la dérive automatiquement, s'il y a de grandes différences de température Design plat, idéal pour être fix...

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CA$31.00 - CA$31.00
CA$31.00
CA$31.00 - CA$31.00
CA$31.00
CA$361.00 - CA$361.00
CA$361.00
CA$361.00 - CA$361.00
CA$361.00

Celestron Moteur de Focus

CEL-94155-A
1 en stock

Caractéristiques Le moteur de mise au point Celestron permet la mise au point électronique à l'aide d'un ordinateur ou d'un contrôleur manuel i...

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CA$361.00 - CA$361.00
CA$361.00
CA$361.00 - CA$361.00
CA$361.00
iOptron iAFS2 2'' Camera Adapter
CA$45.00 - CA$45.00
CA$45.00
CA$45.00 - CA$45.00
CA$45.00

iOptron iAFS2 2'' Camera Adapter

IOP-P-FA20-CA

Connects Cameras to 2" Telescope Focusers Provides a Secure, Rigid Mounting Platform Standard T-Thread (M42x0.75) Camera Interface Matte Black Int...

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CA$45.00 - CA$45.00
CA$45.00
CA$45.00 - CA$45.00
CA$45.00
iOptron iAFS3 3'' Camera Adapter
CA$55.00 - CA$55.00
CA$55.00
CA$55.00 - CA$55.00
CA$55.00

iOptron iAFS3 3'' Camera Adapter

IOP-P-FA30-CA

3-inch Barrel Diameter Provides Secure Connection for Imaging Cameras Minimizes Flexure in the Optical Train Designed for Large Format Focusers ...

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CA$55.00 - CA$55.00
CA$55.00
CA$55.00 - CA$55.00
CA$55.00
CA$159.00 - CA$159.00
CA$159.00
CA$159.00 - CA$159.00
CA$159.00

Lacerta Kit avec micro réduction ​1:10 pour porte-oculaires Crayford

LAC-MICFOC-S
4 en stock

Unité de micro-réduction 1:10 Compatible avec de nombreuses marques Description Dans la boîte Téléchargements Lacerta Kit avec micro rédu...

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CA$159.00 - CA$159.00
CA$159.00
CA$159.00 - CA$159.00
CA$159.00
Orion Optics UK AG10 Equipment upgrade to allow fitting of Atlas focuser
CA$767.00 - CA$767.00
CA$767.00
CA$767.00 - CA$767.00
CA$767.00

Orion Optics UK AG10 Equipment upgrade to allow fitting of Atlas focuser

OOUK-AG10-EQUIPMENT-UPGRADE-ALLOW-FITTING

Fits the FLI Atlas focuser to the AG10 Replaces the standard Ceres focuser Individually machined to order in the UK Description Specifications ...

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CA$767.00 - CA$767.00
CA$767.00
CA$767.00 - CA$767.00
CA$767.00
Orion Optics UK AG10 Focuser stabilisation upgrade and CNC tube ring stability upgrade kit for ACU-3 focuser or Atlas
CA$1,130.00 - CA$1,130.00
CA$1,130.00
CA$1,130.00 - CA$1,130.00
CA$1,130.00

Orion Optics UK AG10 Focuser stabilisation upgrade and CNC tube ring stability upgrade kit for ACU-3 focuser or Atlas

OOUK-AG10-FOCUSER-STABILISATION-UPGRADE-CNC

For the AG10 astrograph Reinforces focuser and tube-ring positions For the ACU-3 or Atlas focuser Individually machined to order in the UK Desc...

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CA$1,130.00 - CA$1,130.00
CA$1,130.00
CA$1,130.00 - CA$1,130.00
CA$1,130.00
Orion Optics UK AG12 Equipment upgrade to allow fitting of Atlas focuser
CA$767.00 - CA$767.00
CA$767.00
CA$767.00 - CA$767.00
CA$767.00

Orion Optics UK AG12 Equipment upgrade to allow fitting of Atlas focuser

OOUK-AG12-EQUIPMENT-UPGRADE-ALLOW-FITTING

Fits the FLI Atlas focuser to the AG12 Replaces the standard Ceres focuser Individually machined to order in the UK Description Specifications ...

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CA$767.00 - CA$767.00
CA$767.00
CA$767.00 - CA$767.00
CA$767.00
Orion Optics UK AG12 Focuser stabilisation upgrade and CNC tube ring stability upgrade kit for ACU-3 focuser or Atlas
CA$1,306.00 - CA$1,306.00
CA$1,306.00
CA$1,306.00 - CA$1,306.00
CA$1,306.00

Orion Optics UK AG12 Focuser stabilisation upgrade and CNC tube ring stability upgrade kit for ACU-3 focuser or Atlas

OOUK-AG12-FOCUSER-STABILISATION-UPGRADE-CNC

For the AG12 astrograph Reinforces focuser and tube-ring positions For the ACU-3 or Atlas focuser Individually machined to order in the UK Desc...

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CA$1,306.00 - CA$1,306.00
CA$1,306.00
CA$1,306.00 - CA$1,306.00
CA$1,306.00
Orion Optics UK AG14 Equipment upgrade to allow fitting of Atlas focuser
CA$767.00 - CA$767.00
CA$767.00
CA$767.00 - CA$767.00
CA$767.00

Orion Optics UK AG14 Equipment upgrade to allow fitting of Atlas focuser

OOUK-AG14-EQUIPMENT-UPGRADE-ALLOW-FITTING

Fits the FLI Atlas focuser to the AG14 Replaces the standard Ceres focuser Individually machined to order in the UK Description Specifications ...

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CA$767.00 - CA$767.00
CA$767.00
CA$767.00 - CA$767.00
CA$767.00

Small Parts That Fix Real Focuser Problems

Each item here corresponds to a symptom. Matching the part to the symptom is quicker and cheaper than a replacement focuser.

  • Compression rings: Replace a single set screw with even radial clamping. This stops the barrel marking and, more importantly, removes the tilt a point-contact screw induces in an imaging train.
  • Motor brackets and couplers: Attach a stepper motor to an existing fine-focus shaft, adding absolute positioning and autofocus without replacing the drawtube.
  • Reduction knobs and dual-speed retrofits: Add 10:1 fine focus to a single-speed focuser, which matters most at fast focal ratios where the critical focus zone is very narrow.
  • Drawtube tension and locking hardware: Adjust or restore the friction that stops a Crayford slipping under a heavy camera train at steep angles.
  • Rotation collars: Rotate the camera for framing without unthreading the imaging train and losing your spacing.
  • Extension tubes and terminations: Reach focus with accessories that would otherwise fall inside the drawtube's travel range, and convert the output to standard imaging threads.

Why Choose David Astro for Focuser Accessories

Diagnosing the fault correctly is worth more than the part itself.

  • Symptom-based advice: Tell us what is happening — slipping, drifting focus, marked barrels, one-sided stars — and we will tell you which part addresses it rather than selling an upgrade you may not need.
  • Model-specific fitting: Motor brackets and reduction retrofits are made for particular focusers, and we confirm the match before shipping.
  • Tilt awareness: We treat set-screw induced tilt as a real optical problem, because at fast focal ratios it produces star elongation that looks like a corrector spacing error.
  • Authorized dealer: Genuine parts with full manufacturer warranty, in stock, with fast shipping across Canada and worldwide.
  • Ships from Canada: Domestic delivery with no duties or brokerage fees for Canadian buyers.

Focuser Accessories in Canada — Frequently Asked Questions

Will a compression ring really improve my images?
If you are using a single set screw on a heavy camera train, very likely. Point contact tilts the barrel by a fraction of a degree, which at f/5 is enough to elongate stars on one side of the field.
Can I motorize any focuser?
Most focusers with an exposed fine-focus shaft can take a bracket-mounted motor. Tell us the focuser model and we will confirm whether a bracket exists or whether replacement is the better route.
Why does my focuser slip near zenith?
Crayford focusers rely on friction, and the load direction changes as the tube tilts. Adjusting drawtube tension often fixes it; if not, the train has exceeded what the mechanism can hold and a rack-and-pinion is the answer.
Do you carry parts for older focusers?
Often. Many manufacturers supply service parts to dealers that are not listed publicly. Send us the model and we will check availability.

Diagnosing a focuser problem?

Describe the symptom and we will identify the part that fixes it. Canadian stock, fast domestic shipping.