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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

iOptron iAFS2 2'' Camera Adapter
$32.00 USD - $32.00 USD
$32.00 USD
$32.00 USD - $32.00 USD
$32.00 USD

iOptron Adaptateur caméra iAFS2 2''

Adaptateur caméra pour le porte-oculaire iOptron iAFS2 Offre une plateforme de montage sûre et rigide Filetage M48x0.75 côté caméra Description...

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$32.00 USD - $32.00 USD
$32.00 USD
$32.00 USD - $32.00 USD
$32.00 USD
iOptron iAFS3 3'' Camera Adapter
$39.00 USD - $39.00 USD
$39.00 USD
$39.00 USD - $39.00 USD
$39.00 USD

iOptron Adaptateur caméra iAFS3 3''

Filetage caméra M68x1 Assure une connexion sûre pour les caméras d'imagerie Se visse côté caméra du porte-oculaire iAFS3 Conçu pour le porte-ocula...

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$39.00 USD - $39.00 USD
$39.00 USD
$39.00 USD - $39.00 USD
$39.00 USD
Économisez 9% Économisez %
$115.00 USD
$115.00 USD - $115.00 USD
$115.00 USD
$105.00 USD
$105.00 USD - $105.00 USD
$105.00 USD

Lacerta Kit de mise à niveau microfocus à double vitesse 1:10 pour porte-oculaires Crayford Sky-Watcher

Ajoute une mise au point fine à double vitesse 1:10 Conçu pour les porte-oculaires Crayford Sky-Watcher sans microfocuser d'origine Remplace toute...

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$115.00 USD
$115.00 USD - $115.00 USD
$115.00 USD
$105.00 USD
$105.00 USD - $105.00 USD
$105.00 USD
Économisez 9% Économisez %
Orion Optics UK 3" down to 2" push fit with 10mm BFD
$200.29 USD - $200.29 USD
$200.29 USD
$200.29 USD - $200.29 USD
$200.29 USD

Orion Optics UK Adaptateur à emboîtement de 3" à 2" avec backfocus de 10mm

Emboîtement de 3" à 2" Backfocus de 10mm Usiné individuellement sur commande au Royaume-Uni Description Caractéristiques Dans la boîte Garantie...

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$200.29 USD - $200.29 USD
$200.29 USD
$200.29 USD - $200.29 USD
$200.29 USD
Orion Optics UK AG10 Equipment upgrade to allow fitting of Atlas focuser
$548.00 USD - $548.00 USD
$548.00 USD
$548.00 USD - $548.00 USD
$548.00 USD

Orion Optics UK AG10 Kit d'adaptation du porte-oculaire Atlas

Adapte le porte-oculaire FLI Atlas à l'AG10 Remplace le porte-oculaire Ceres standard Usiné individuellement sur commande au Royaume-Uni Descri...

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$548.00 USD - $548.00 USD
$548.00 USD
$548.00 USD - $548.00 USD
$548.00 USD
Orion Optics UK AG10 Focuser stabilisation upgrade and CNC tube ring stability upgrade kit for ACU-3 focuser or Atlas
$806.93 USD - $806.93 USD
$806.93 USD
$806.93 USD - $806.93 USD
$806.93 USD

Orion Optics UK AG10 Kit de stabilisation du porte-oculaire et d'amélioration de la stabilité des anneaux de tube CNC pour porte-oculaire ACU-3 ou Atlas

Pour l'astrographe AG10 Renforce les positions du porte-oculaire et des anneaux de tube Pour le porte-oculaire ACU-3 ou Atlas Usiné individuelleme...

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$806.93 USD - $806.93 USD
$806.93 USD
$806.93 USD - $806.93 USD
$806.93 USD
Orion Optics UK AG12 Equipment upgrade to allow fitting of Atlas focuser
$548.00 USD - $548.00 USD
$548.00 USD
$548.00 USD - $548.00 USD
$548.00 USD

Orion Optics UK AG12 Kit d'adaptation du porte-oculaire Atlas

Adapte le porte-oculaire FLI Atlas à l'AG12 Remplace le porte-oculaire Ceres standard Usiné individuellement sur commande au Royaume-Uni Descri...

Afficher tous les détails
$548.00 USD - $548.00 USD
$548.00 USD
$548.00 USD - $548.00 USD
$548.00 USD
Orion Optics UK AG12 Focuser stabilisation upgrade and CNC tube ring stability upgrade kit for ACU-3 focuser or Atlas
$932.70 USD - $932.70 USD
$932.70 USD
$932.70 USD - $932.70 USD
$932.70 USD

Orion Optics UK AG12 Kit de stabilisation du porte-oculaire et d'amélioration de la stabilité des anneaux de tube CNC pour porte-oculaire ACU-3 ou Atlas

Pour l'astrographe AG12 Renforce les positions du porte-oculaire et des anneaux de tube Pour le porte-oculaire ACU-3 ou Atlas Usiné individuelleme...

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$932.70 USD - $932.70 USD
$932.70 USD
$932.70 USD - $932.70 USD
$932.70 USD
Orion Optics UK AG14 Equipment upgrade to allow fitting of Atlas focuser
$548.00 USD - $548.00 USD
$548.00 USD
$548.00 USD - $548.00 USD
$548.00 USD

Orion Optics UK AG14 Kit d'adaptation du porte-oculaire Atlas

Adapte le porte-oculaire FLI Atlas à l'AG14 Remplace le porte-oculaire Ceres standard Usiné individuellement sur commande au Royaume-Uni Descri...

Afficher tous les détails
$548.00 USD - $548.00 USD
$548.00 USD
$548.00 USD - $548.00 USD
$548.00 USD
Orion Optics UK AG14 Focuser stabilisation upgrade and CNC tube ring stability upgrade kit for ACU-3 focuser or Atlas
$1,006.68 USD - $1,006.68 USD
$1,006.68 USD
$1,006.68 USD - $1,006.68 USD
$1,006.68 USD

Orion Optics UK AG14 Kit de stabilisation du porte-oculaire et d'amélioration de la stabilité des anneaux de tube CNC pour porte-oculaire ACU-3 ou Atlas

Pour l'astrographe AG14 Renforce les positions du porte-oculaire et des anneaux de tube Pour le porte-oculaire ACU-3 ou Atlas Usiné individuelleme...

Afficher tous les détails
$1,006.68 USD - $1,006.68 USD
$1,006.68 USD
$1,006.68 USD - $1,006.68 USD
$1,006.68 USD
Orion Optics UK AG16 Equipment upgrade to allow fitting of Atlas focuser
$548.00 USD - $548.00 USD
$548.00 USD
$548.00 USD - $548.00 USD
$548.00 USD

Orion Optics UK AG16 Kit d'adaptation du porte-oculaire Atlas

Adapte le porte-oculaire FLI Atlas à l'AG16 Remplace le porte-oculaire Ceres standard Usiné individuellement sur commande au Royaume-Uni Descri...

Afficher tous les détails
$548.00 USD - $548.00 USD
$548.00 USD
$548.00 USD - $548.00 USD
$548.00 USD
Orion Optics UK AG16 Focuser stabilisation upgrade and CNC tube ring stability upgrade kit for ACU-3 focuser or Atlas
$1,139.84 USD - $1,139.84 USD
$1,139.84 USD
$1,139.84 USD - $1,139.84 USD
$1,139.84 USD

Orion Optics UK AG16 Kit de stabilisation du porte-oculaire et d'amélioration de la stabilité des anneaux de tube CNC pour porte-oculaire ACU-3 ou Atlas

Pour l'astrographe AG16 Renforce les positions du porte-oculaire et des anneaux de tube Pour le porte-oculaire ACU-3 ou Atlas Usiné individuelleme...

Afficher tous les détails
$1,139.84 USD - $1,139.84 USD
$1,139.84 USD
$1,139.84 USD - $1,139.84 USD
$1,139.84 USD
Orion Optics UK AG8 Equipment upgrade to allow fitting of Atlas focuser
$548.00 USD - $548.00 USD
$548.00 USD
$548.00 USD - $548.00 USD
$548.00 USD

Orion Optics UK AG8 Kit d'adaptation du porte-oculaire Atlas

Adapte le porte-oculaire FLI Atlas à l'AG8 Remplace le porte-oculaire Ceres standard Usiné individuellement sur commande au Royaume-Uni Descrip...

Afficher tous les détails
$548.00 USD - $548.00 USD
$548.00 USD
$548.00 USD - $548.00 USD
$548.00 USD
Orion Optics UK AG8 Focuser stabilisation upgrade and CNC tube ring stability upgrade kit for ACU-3 focuser or Atlas
$695.96 USD - $695.96 USD
$695.96 USD
$695.96 USD - $695.96 USD
$695.96 USD

Orion Optics UK AG8 Kit de stabilisation du porte-oculaire et d'amélioration de la stabilité des anneaux de tube CNC pour porte-oculaire ACU-3 ou Atlas

Pour l'astrographe AG8 Renforce les positions du porte-oculaire et des anneaux de tube Pour le porte-oculaire ACU-3 ou Atlas Usiné individuellemen...

Afficher tous les détails
$695.96 USD - $695.96 USD
$695.96 USD
$695.96 USD - $695.96 USD
$695.96 USD
Pegasus Astro Prodigy Microfocuser Telescope Adapter for Celestron Edge 11'', 14''
$78.00 USD - $78.00 USD
$78.00 USD
$78.00 USD - $78.00 USD
$78.00 USD

Pegasus Astro Prodigy Microfocuser Telescope Adapter for Celestron Edge 11'', 14''

Securely adapts the Prodigy Microfocuser to Celestron EdgeHD 11" telescopes Designed for a direct fit on Celestron EdgeHD 14" optical tubes Enable...

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$78.00 USD - $78.00 USD
$78.00 USD
$78.00 USD - $78.00 USD
$78.00 USD
Pegasus Astro Prodigy Microfocuser Telescope Adapter for GSO RC 10'', 12'', 14'', 16''
$90.00 USD - $90.00 USD
$90.00 USD
$90.00 USD - $90.00 USD
$90.00 USD

Pegasus Astro Prodigy Microfocuser Telescope Adapter for GSO RC 10'', 12'', 14'', 16''

Connects Prodigy Microfocuser to large Ritchey-Chrétien telescopes Designed for GSO RC models of 10", 12", 14", and 16" aperture Ensures a r...

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$90.00 USD - $90.00 USD
$90.00 USD
$90.00 USD - $90.00 USD
$90.00 USD
Pegasus Astro Prodigy Microfocuser Telescope Adapter for GSO RC 8''
$78.00 USD - $78.00 USD
$78.00 USD
$78.00 USD - $78.00 USD
$78.00 USD

Pegasus Astro Prodigy Microfocuser Telescope Adapter for GSO RC 8''

Connects Prodigy Microfocuser to GSO RC 8" Telescopes Compatible with Astrotech, Omegon, Altair, and TS RC 8" Models Ensures Rigid, No-Flexu...

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$78.00 USD - $78.00 USD
$78.00 USD
$78.00 USD - $78.00 USD
$78.00 USD
Pegasus Astro Prodigy Microfocuser Telescope Adapter for Newtonian 10-inch
$102.00 USD - $102.00 USD
$102.00 USD
$102.00 USD - $102.00 USD
$102.00 USD

Pegasus Astro Prodigy Microfocuser Telescope Adapter for Newtonian 10-inch

Adapts Prodigy Microfocuser to 10-inch Newtonian Telescopes Ensures a rigid, secure connection for precise autofocus Engineered specifically...

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$102.00 USD - $102.00 USD
$102.00 USD
$102.00 USD - $102.00 USD
$102.00 USD
Pegasus Astro Prodigy Microfocuser Telescope Adapter for Newtonian 12-inch
$102.00 USD - $102.00 USD
$102.00 USD
$102.00 USD - $102.00 USD
$102.00 USD

Pegasus Astro Prodigy Microfocuser Telescope Adapter for Newtonian 12-inch

Designed for 12-inch Newtonian Telescopes Securely Mounts the Prodigy Microfocuser (Sold Separately) Mechanical drawing available to check the fit...

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$102.00 USD - $102.00 USD
$102.00 USD
$102.00 USD - $102.00 USD
$102.00 USD
Pegasus Astro Prodigy Microfocuser Telescope Adapter M68 Female
$72.00 USD - $72.00 USD
$72.00 USD
$72.00 USD - $72.00 USD
$72.00 USD

Pegasus Astro Prodigy Microfocuser Telescope Adapter M68 Female

Connects M68 Threaded Accessories to Prodigy Microfocuser M68 x 1 Female Thread Secure, Direct-Fit Camera-Side Adapter Designed for Pegasu...

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$72.00 USD - $72.00 USD
$72.00 USD
$72.00 USD - $72.00 USD
$72.00 USD
Pegasus Astro Prodigy Microfocuser Telescope Paired Adapters for Skywatcher Esprit 100
$190.00 USD - $190.00 USD
$190.00 USD
$190.00 USD - $190.00 USD
$190.00 USD

Pegasus Astro Prodigy Microfocuser Telescope Paired Adapters for Skywatcher Esprit 100

Connects Prodigy Microfocuser to Sky-Watcher Esprit 100 Two-part design includes a main adapter and a spacer Provides a secure, rigid mounting sol...

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$190.00 USD - $190.00 USD
$190.00 USD
$190.00 USD - $190.00 USD
$190.00 USD
Pegasus Astro SCT Bracket, Pulley, Belt, Bolts Kit for SCT 6.8.9.25''
$86.00 USD - $86.00 USD
$86.00 USD
$86.00 USD - $86.00 USD
$86.00 USD

Pegasus Astro SCT Bracket, Pulley, Belt, Bolts Kit for SCT 6, 8, 9.25''

Precise 1.8° step angle bipolar stepper motor Zero-backlash pulley and belt design Lightweight 280g total package Robust "Margarita" style anodize...

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$86.00 USD - $86.00 USD
$86.00 USD
$86.00 USD - $86.00 USD
$86.00 USD
Pegasus Astro SCT Bracket, Pulley, Belt, Bolts Kit for SCT11
$86.00 USD - $86.00 USD
$86.00 USD
$86.00 USD - $86.00 USD
$86.00 USD

Pegasus Astro SCT Bracket, Pulley, Belt, Bolts Kit for SCT11

Designed for Celestron 11" SCT and EdgeHD Telescopes Zero-Backlash Bipolar Stepper Motor Holding Torque of 0.8 Kg/cm for Precise Mirror Control Li...

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$86.00 USD - $86.00 USD
$86.00 USD
$86.00 USD - $86.00 USD
$86.00 USD
Pegasus Astro SCT Bracket, Pulley, Belt, Bolts Kit for SCT14
$86.00 USD - $86.00 USD
$86.00 USD
$86.00 USD - $86.00 USD
$86.00 USD

Pegasus Astro SCT Bracket, Pulley, Belt, Bolts Kit for SCT14

Designed specifically for Celestron 14" SCT, EdgeHD, and RASA telescopes Zero-backlash bipolar stepper motor with 0.8Kg/cm of holding torque Inclu...

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$86.00 USD - $86.00 USD
$86.00 USD
$86.00 USD - $86.00 USD
$86.00 USD

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.