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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

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Pegasus Support Universel en L

PEG-UNIV-LBRACK

Un support en aluminium anodisé noir en forme de L, difficile à plier, a des rails coupés et peut être fixé à une large gamme de porte-oculaires. ...

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Pegasus Kit Support Universel en L, Coupleurs et Vis

PEG-UNIV-KIT
1 en stock

Support universel en L, coupleurs et kit de boulons.

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Adaptateur PrimaLuceLab 26mm pour SESTO SENSO 2

PLL-SESTOSENSO-AD26II

Cet adaptateur de 26 mm vous permet d'installer SESTO SENSO 2 sur des porte-oculaires équipés d'un arbre de 26 mm de diamètre, comme les porte-ocul...

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Adaptateur PrimaLuceLab 33mm pour SESTO SENSO 2

PLL-SESTOSENSO-AD33II

Cet adaptateur de 33 mm vous permet d'installer SESTO SENSO 2 sur des porte-oculaires équipés d'un arbre de 33 mm de diamètre, comme les porte-ocul...

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Adaptateur PrimaLuceLab 37mm pour SESTO SENSO 2

PLL-SESTOSENSO-AD37II

Cet adaptateur 37mm s'installe sur le porte oculaire à la place des 2 molettes (macrométrique et micrométrique), vous pouvez alors installer SES...

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$85.00 - $85.00
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PrimaLuceLab 40mm Extension Tube for ESATTO 3"
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PrimaLuceLab 40mm Extension Tube for ESATTO 3"

PLL-PL3600317

Adds 40mm of back focus for ESATTO 3" focusers Enables focus with long-travel telescopes like refractors Precise dovetail coupling system for rigi...

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Tube d'extension PrimaLuceLab 65mm pour ESATTO 3"

PLL-PL3600284

Lors de l'installation d'ESATTO 3" dans un télescope avec un porte-oculaire à longue course (comme ceux que l'on trouve habituellement sur les r...

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Adaptateur PrimaLuceLab ESATTO 2" pour ARCO 2"

PLL-PL3600412

L'adaptateur ESATTO 2" pour ARCO 2" vous permet de connecter le rotateur au microfocuser ESATTO 2" ESATTO 2" et de le contrôler via le port spécial...

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Adaptateur PrimaLuceLab ESATTO 2" pour Borg 55FL f3.6

PLL-PL3600248

Cet adaptateur vous permet ainsi d'utiliser le microfocuseur robotique ESATTO 2" avec l'objectif fluorite Borg 55mm et le réducteur 7880 pour créer...

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Adaptateur PrimaLuceLab ESATTO 2" pour GSO/Orion/TPO Ritchey-Chretien 6 et 8"

PLL-PL3600235

Si vous recherchez la mise au point motorisée la plus précise pour utiliser le GSO/Orion/TPO Ritchey-Chretien 152 mm f/9 ou 203 mm f/8 (tubes alum...

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Adaptateur PrimaLuceLab ESATTO 2" pour Sky-Watcher/Orion ED80, ED100 et ED120

PLL-PL3600230

Si vous recherchez le porte-oculaire motorisé le plus précis pour utiliser les réfracteurs apochromatiques SkyWatcher/Orion ED80, ED100 ou ED120 po...

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Adaptateur PrimaLuceLab ESATTO 2" pour Sky-Watcher/Orion Newton 200 f4 et f5

PLL-PL3600229

Si vous recherchez la mise au point motorisée la plus précise pour utiliser les réflecteurs SkyWatcher/Orion Newton 200 f4 et f5 pour l'astrophotog...

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Adaptateur PrimaLuceLab ESATTO 2" pour Sky-Watcher/Orion Newton 250 f4 et f5

PLL-PL3600237

Si vous recherchez la mise au point motorisée la plus précise pour utiliser le réflecteur SkyWatcher/Orion Newton 250 f4 et f5 pour l'astrophotogra...

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Adaptateur PrimaLuceLab ESATTO 2" pour Takahashi FS-60Q

PLL-PL3600255

Si vous recherchez la mise au point motorisée la plus précise pour Takahashi FS-60Q, cet adaptateur vous permet de connecter ESATTO 2" à ce télesc...

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Adaptateur PrimaLuceLab ESATTO 2" pour télescopes avec grand filetage SC 3,3"

PLL-PL3600212

L'adaptateur SC 3,3" pour ESATTO 2" vous permet de connecter l'ESATTO 2" aux modèles Celestron SCT (11" et 14") et EdgeHD (925, 1100 et 1400). Étan...

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Adaptateur PrimaLuceLab ESATTO 2" pour télescopes avec filetage SC

PLL-PL3600209

Grâce à son profil bas, l'ESATTO 2" est le porte-oculaire motorisé parfait pour les télescopes Schmidt-Cassegrain comme les modèles Celestron SCT ...

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PrimaLuceLab Adapter ESATTO 2" LP and ARCO 2" for telescopes with SC thread
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PrimaLuceLab Adapter ESATTO 2" LP and ARCO 2" for telescopes with SC thread

PLL-PL3600542

Connects ESATTO 2" LP Focuser to SC threads Connects ARCO 2" Rotator to SC threads Enables a fully threaded, rigid imaging train Designed for Schm...

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PrimaLuceLab Adapter ESATTO 2" LP for ARCO 2"
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PrimaLuceLab Adapter ESATTO 2" LP for ARCO 2"

PLL-PL3600538

Connects the PrimaLuceLab ESATTO 2" LP Focuser to the ARCO 2" Rotator Creates a rigid, unified imaging assembly with a 22mm combined thickness Mai...

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PrimaLuceLab Adapter ESATTO 2” LP for telescopes with large 3.3" SC thread
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$95.00
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PrimaLuceLab Adapter ESATTO 2” LP for telescopes with large 3.3" SC thread

PLL-PL3600539

Connects ESATTO 2” LP to telescopes with a large 3.3" SC thread Designed for Celestron SCT (11" and 14") and EdgeHD (9.25", 11", and 14") models E...

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PrimaLuceLab Adapter ESATTO 3" for ARCO 2"

PLL-PL3600416

Connects ARCO 2" Rotator to ESATTO 3" Focuser Enables Direct Power and Control via ESATTO Port Creates a Rigid, Mechanically Coupled Imaging Train...

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PrimaLuceLab Adapter ESATTO 3" for ARCO 3"

PLL-PL3600458

Connects ESATTO 3" Focuser to ARCO 3" Rotator Enables Electronic Control via ESATTO Port Results in a Combined Rotator Thickness of 24.5mm Maintai...

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Adaptateur PrimaLuceLab ESATTO 3" pour Borg 90FL et 107FL f3.9

PLL-PL3600268

Si vous recherchez la mise au point motorisée la plus précise pour Borg 90FL et 107FL f3.9, cet adaptateur vous permet de connecter ESATTO 3" à ce...

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Adaptateur PrimaLuceLab ESATTO 3" pour GSO/Orion/TPO Ritchey-Chretien 10, 12, 14 et 16"

PLL-PL3600236

Si vous recherchez le porte-oculaire motorisé le plus précis pour utiliser les GSO/Orion/TPO Ritchey-Chretien 10, 12, 14 et 16 pouces (tubes alumin...

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$295.00 - $295.00
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Adaptateur PrimaLuceLab ESATTO 3" pour Meade 16" avec filetage 4"

PLL-PL3600292

L'adaptateur ESATTO 3" pour Meade 16 pouces avec filetage 4" permet de connecter ESATTO 3" aux télescopes Meade LX200 SCT, LX200 GPS, LX200-ACF, L...

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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.