Skip to content
Price match 30-day returns* Talk to an astronomer before you buy

Focusers

At f/4, the critical focus zone is a few tens of microns. A metal telescope tube contracting through a fifteen-degree Canadian night will move focus well outside that on its own, which is why motorized, temperature-compensated focus stopped being a luxury for imagers. David Astro carries focusers in Canada — manual dual-speed, stepper-driven and fully robotic — in Canadian inventory and shipped domestically.

Fit and load capacity are the two decisions that matter. Tell us your telescope and the weight of your camera train and we will specify the focuser and the mounting adapter together.

Filters

$610.00 - $640.00
$610.00 - $640.00
$610.00 - $640.00
$610.00

Starlight Instruments Feather Touch 2.5" R&P Focuser

Options available

2.5" Diameter Helical Rack and Pinion Focuser 13-15 Pound Lifting Capacity for Heavy Imaging Trains 10:1 Dual-Speed Fine Focus Reduction 360-Degre...

View full details
$610.00 - $640.00
$610.00 - $640.00
$610.00 - $640.00
$610.00
$630.00 - $660.00
$630.00 - $660.00
$630.00 - $660.00
$630.00

Starlight Instruments Feather Touch 3.0" R&P Focuser

Options available

3.0" Diameter Helical Rack & Pinion Focuser 13-15 pound lifting capacity for heavy imaging trains 10:1 dual-speed reduction for precise fine f...

View full details
$630.00 - $660.00
$630.00 - $660.00
$630.00 - $660.00
$630.00
$960.00 - $980.00
$960.00 - $980.00
$960.00 - $980.00
$960.00

Starlight Instruments Feather Touch 3.5" R&P Focuser

Options available

3.5-inch rack and pinion focuser for large telescopes Supports heavy imaging payloads of 18-20 pounds Dual-speed 10:1 reduction ratio for precise ...

View full details
$960.00 - $980.00
$960.00 - $980.00
$960.00 - $980.00
$960.00
$1,260.00 - $1,260.00
$1,260.00
$1,260.00 - $1,260.00
$1,260.00

Starlight Instruments Feather Touch 3.5" R&P Focuser Kit for FSQ-106

SI-FTF3515-TAK FSQ106ED

Custom designed for the Takahashi FSQ-106ED telescope Robust 18-20 pound lifting capacity supports heavy imaging trains Precise 10:1 dual-speed re...

View full details
$1,260.00 - $1,260.00
$1,260.00
$1,260.00 - $1,260.00
$1,260.00
$1,245.00 - $1,275.00
$1,245.00 - $1,275.00
$1,245.00 - $1,275.00
$1,245.00

Starlight Instruments Feather Touch Gen II 3.0" Motorized R&P Focuser

Options available

Lifts imaging trains up to 56 lb with zero slip Achieves 0.23 micron resolution per step for critical focus Integrated Posi Drive Motor System (PD...

View full details
$1,245.00 - $1,275.00
$1,245.00 - $1,275.00
$1,245.00 - $1,275.00
$1,245.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00

Starlight Instruments Feather Touch Micro Focuser for Celestron 6" Evolution

SI-FTM-C6 Evolution

Replaces stock focuser on Celestron 6" Evolution & select 6SE SCTs Dual-speed mechanism for precise fine-focus adjustments Eliminates primary ...

View full details
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$370.00 - $370.00
$370.00
$370.00 - $370.00
$370.00

Starlight Instruments Feather Touch Micro Focuser for Celestron C14 SCT

SI-FTM-C14

Installs directly onto Celestron C-14 SCTs Provides dual-speed (coarse and fine) focusing Eliminates image shift caused by stock focuser Enables p...

View full details
$370.00 - $370.00
$370.00
$370.00 - $370.00
$370.00
$360.00 - $360.00
$360.00
$360.00 - $360.00
$360.00

Starlight Instruments Feather Touch Micro Focuser for Celestron C9.25 SCT

SI-FTM-C9.25

Direct focuser upgrade for Celestron C9.25 SCT telescopes Provides 10:1 dual-speed fine focus control Eliminates image shift and "mirror flop" fro...

View full details
$360.00 - $360.00
$360.00
$360.00 - $360.00
$360.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00

Starlight Instruments Feather Touch Micro Focuser for Celestron CPC11, C11 Edge HD, RASA 11" SCT

SI-FTM-CPC11

Replaces stock focuser on Celestron 11" SCTs True dual-speed 10:1 fine focus mechanism Eliminates image shift and mirror flop Installs easily with...

View full details
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00

Starlight Instruments Feather Touch Micro Focuser for Celestron CPC800/RASA 8", NexStar 6SE, C8Edge HD 8SE SCT and Sky-Watcher 150/180mm Mak

SI-FTM-CPC8

Replaces stock SCT focuser with a dual-speed mechanism Eliminates image shift for high-magnification viewing and imaging Designed for specific Cel...

View full details
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$360.00 - $360.00
$360.00
$360.00 - $360.00
$360.00

Starlight Instruments Feather Touch Micro Focuser for Celestron CPC9.25, C9.25 Edge HD, SCT

SI-FTM-CPC9.25

Replaces stock focuser knob with a dual-speed system Eliminates image shift and mirror flop common in SCTs Planetary reduction mechanism for ultra...

View full details
$360.00 - $360.00
$360.00
$360.00 - $360.00
$360.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00

Starlight Instruments Feather Touch Micro for Celestron C11 SCT (NOT CPC1100)

SI-FTM-C11

Replaces stock focuser on Celestron C11 SCTs Adds dual-speed fine focusing control Eliminates image shift and backlash Designed for C11 telescopes...

View full details
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$370.00 - $370.00
$370.00
$370.00 - $370.00
$370.00

Starlight Instruments Feather Touch Micro for Celestron C14 Edge HD SCT

SI-FTM-C14HD

Adds dual-speed coarse and fine focusing to your telescope Engineered to eliminate common SCT image shift and mirror flop Direct-fit upgrade for C...

View full details
$370.00 - $370.00
$370.00
$370.00 - $370.00
$370.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00

Starlight Instruments Feather Touch Micro for Celestron C8 (NOT CPC/NexStar SE)

SI-FTM-C8

Replaces stock focuser on Celestron C8 SCTs Provides ultra-fine, dual-speed focusing control Eliminates mirror shift and image slop Adds zero back...

View full details
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00

Starlight Instruments Feather Touch Micro for Meade 14.0" SCTs

SI-FTM-M14

Direct-fit upgrade for all Meade 14.0" SCTs, including LX200GPS and Classic models Adds ultra-precise dual-speed focusing control Dramatically red...

View full details
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00

Starlight Instruments Feather Touch Micro for Meade 8.0" SCT (Including Meade LX90, LX200GPS, LX200 Classics & 7" Mak)

SI-FTM-M8

Replaces stock focuser on Meade 8.0" SCTs and 7" Maksutovs Adds dual-speed, ultra-fine focusing control Eliminates image-shift and coarse focus ju...

View full details
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00

Starlight Instruments Feather Touch Micro for Meade f/10 10" or 12" SCTs

SI-FTM-M1012

Direct-fit upgrade for Meade 10" and 12" f/10 SCTs Replaces stock focuser on LX90, LX200GPS, and LX200 Classic models Dual-speed mechanism for pre...

View full details
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$440.00 - $440.00
$440.00
$440.00 - $440.00
$440.00

Starlight Instruments Feather Touch Micro for Meade f/8 10" or 12" SCTs

SI-FTM-M1012-F8

Replaces the stock focuser knob on Meade f/8 10" and 12" SCTs Adds dual-speed, high-precision focusing control Eliminates image shift caused by mi...

View full details
$440.00 - $440.00
$440.00
$440.00 - $440.00
$440.00
$280.00 - $480.00
$280.00 - $480.00
$280.00 - $480.00
$280.00

Starlight Instruments Feather Touch Rotatable 1.25" Crayford Focuser

Options available

10:1 dual-speed reduction for ultra-fine focus control Available with 0.75" or 1.5" of drawtube travel Crayford design eliminates image shift Draw...

View full details
$280.00 - $480.00
$280.00 - $480.00
$280.00 - $480.00
$280.00
$570.00 - $590.00
$570.00 - $590.00
$570.00 - $590.00
$570.00

Starlight Instruments Feather Touch Rotatable 2.0" Crayford Focuser

Options available

10:1 fine-focus reduction ratio for precise adjustments 8-10 pound lifting capacity supports heavy imaging trains Crayford drive mechanism for zer...

View full details
$570.00 - $590.00
$570.00 - $590.00
$570.00 - $590.00
$570.00
$690.00 - $690.00
$690.00
$690.00 - $690.00
$690.00

Starlight Instruments Feather Touch Rotatable 2.0" R&P Focuser

SI-FTF2015BCR-RP

13-15 pound lifting capacity for heavy imaging trains Rack and Pinion drive for zero-slip focusing 10:1 dual-speed fine focus mechanism Fully rota...

View full details
$690.00 - $690.00
$690.00
$690.00 - $690.00
$690.00
$780.00 - $800.00
$780.00 - $800.00
$780.00 - $800.00
$780.00

Starlight Instruments Feather Touch TRUE 3.0" R&P Focuser

Options available

TRUE 3.0" clear aperture for unvignetted imaging with large sensors Supports heavy imaging trains with a 15-17 pound lifting capacity Precision 10...

View full details
$780.00 - $800.00
$780.00 - $800.00
$780.00 - $800.00
$780.00
$265.00 - $265.00
$265.00
$265.00 - $265.00
$265.00

Starlight Instruments Focus Motor for RedCat/SpaceCat

SI-RCEF

Adds electronic focus control to William Optics RedCat/SpaceCat telescopes Based on the proven Starlight Instruments Handy Stepper Motor (HSM) Ena...

View full details
$265.00 - $265.00
$265.00
$265.00 - $265.00
$265.00
$360.00 - $370.00
$360.00 - $370.00
$360.00 - $370.00
$360.00

Starlight Instruments Focuser Boss II Electronic Focusing Control

Options available

Controls 1 or 2 focusers from a single digital hub Connects via USB, Serial, and wired Ethernet standard Optional 802.11 WiFi for complete wireles...

View full details
$360.00 - $370.00
$360.00 - $370.00
$360.00 - $370.00
$360.00

Manual, Motorized and Robotic Focus

All focusers move a drawtube. What separates them is how much they can hold without slipping and how repeatably they can return to a position.

  • Dual-speed manual focusers: Coarse and 10:1 fine focus, entirely adequate for visual observing and for imaging where you are willing to refocus by hand periodically.
  • Stepper motor focusers: Absolute positioning with repeatable steps, enabling automated focus routines and per-filter focus offsets.
  • Robotic microfocusers: High load capacity with integrated temperature sensing and position feedback, designed for unattended operation across a whole night.
  • Load capacity: The specification that matters most for imaging. A camera, filter wheel, off-axis guider and adapters add up quickly, and the load acts as a bending moment when the tube is horizontal.
  • Travel and profile height: A replacement focuser with a taller profile can prevent a telescope reaching focus, particularly on Newtonians. This must be checked before purchase.
  • Temperature compensation: A sensor and coefficient that shift focus automatically as the tube cools, which removes the largest single source of overnight focus drift.

Why Choose David Astro for Focusers

A focuser is a retrofit, and retrofits fail on details that are easy to check beforehand.

  • Focus travel verified: We check that the new focuser's profile still allows your telescope to reach focus with your intended camera or diagonal, which is the most common retrofit failure.
  • Adapter identified: We specify the telescope-specific mounting flange alongside the focuser, so the parts arrive complete.
  • Load calculated with the moment arm: We consider the weight and its distance from the drawtube, not just the total mass.
  • Authorized dealer: Full manufacturer warranty with service handled in Canada.
  • Canadian stock: Ships domestically without duties or brokerage fees for Canadian orders.

Focusers in Canada — Frequently Asked Questions

Do I need an electronic focuser?
For imaging below about f/6, yes in practice. Focus shift with temperature exceeds the critical focus zone over a Canadian night, and refocusing manually every hour costs you exposures and disturbs the rig.
Will a new focuser fit my Newtonian?
Only if its profile height is compatible. A taller focuser can push the focal plane beyond the drawtube's inward travel. Tell us the telescope and we will check before you order.
How much load can a focuser really take?
Rated capacities usually assume the tube pointing up. Near the horizon the same weight acts as a bending moment and effective capacity drops. We size with margin for that.
Can I add temperature compensation later?
On most stepper-based systems, yes — a temperature probe and a measured coefficient are all that is required. We can help determine the coefficient for your specific tube.

Replacing a focuser?

Send us your telescope and imaging train weight and we will specify the focuser and flange. Ships from our Canadian warehouse.