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Starlight Instruments

Ask an experienced imager which single upgrade changed their results most and a surprising number will name a Feather Touch focuser. Starlight Instruments builds precision focusers and adapters in the United States, and their reputation rests on the same thing every time: a drawtube that holds several kilograms perfectly square and moves in repeatable microns. David Astro carries Starlight Instruments products in Canada, shipping from Canadian stock.

Most of that catalogue is adapters and telescope-specific mounting flanges, because Starlight designs retrofits for a very wide range of tubes. Tell us your telescope and we will identify the correct focuser and adapter combination rather than leaving you to decode a part number.

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Starlight Instruments 3.5" Adapter for Teleskop Service TS130/TS150 Photoline

Connects 3.5" Feather Touch Focusers Designed for Teleskop Service TS130 Photoline Telescopes Designed for Teleskop Service TS150 Photoline Telesc...

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Starlight Instruments 3.5" Adapter for TMB130 Telescopes

Connects 3.5" Starlight Instruments focusers to TMB130 telescopes Ensures precise, rigid optical alignment Machined from high-quality aluminum Fin...

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Starlight Instruments 3.5" Adapter for William Optics FLT132, APM 130, and TS Photoline F7 Telescopes

Connects a 3.5" Feather Touch focuser to select telescopes Compatible with William Optics FLT132 Compatible with APM 130 models Compatible with TS...

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Starlight Instruments 3.5" Adapter for William Optics FLT151, FLT152, FLT158 & TS152 Telescopes

Connects a 3.5" Feather Touch Focuser to select William Optics telescopes Compatible with William Optics FLT151, FLT152, and FLT158 models Compati...

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Starlight Instruments 3.5" Adapter for William Optics FLT178

Connects 3.5" Starlight Instruments focusers to William Optics FLT178 telescopes Machined of the highest quality aluminum Finished in Starlight's ...

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Starlight Instruments 3.5" Base Curved w/ Leveling Screws

Custom-machined to match your telescope's tube diameter Provides a rigid, stable platform for 3.5" Feather Touch focusers Integrated leveling scre...

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Starlight Instruments 3.5" Base Flat w/ Leveling Screws

Designed for 3.5" Feather Touch Focusers Flat Base for Custom Telescope Builds Features Leveling Screws for Precise Collimation Mounting Hole Patt...

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Starlight Instruments 3.5" Diameter Riser

3.5" Diameter: Threads directly onto the draw tube of Starlight Instruments 3.5" Feather Touch focusers. 4.0" Height Extension: Adds 4.0 inches ...

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Starlight Instruments 3.5" Diameter Riser, Adds 3.35" to Length

Extends optical path by 3.35" (85 mm) Designed for 3.5" diameter Feather Touch focusers Fits all FTF35xx series focusers Threads directly onto the...

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Starlight Instruments 3.5" End Cap - for Astro-Physics Telescope Accessories

Adapts 3.5" Feather Touch focusers to Astro-Physics accessories Provides a secure 2.7" female threaded connection Eliminates flexure and tilt with...

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Starlight Instruments 3.5" End Cap Collet Style w/ 2.0" Opening

Fits all Starlight Instruments 3.5" Feather Touch focusers Provides a secure 2.0" opening for accessories Collet-style clamp ensures perfect cente...

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Starlight Instruments 3.5" End Cap for APM/TMB Reducer

Connects 3.5" Feather Touch Focusers Adapts APM/TMB Reducers Thread Specification: M82x1 Female Material: High-Grade Aluminum Machined In-House by...

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Starlight Instruments 3.5" End Cap for CFW2-7 Series/CCD Camera & Filter Wheels

Fits 3.5" Starlight Instruments Feather Touch Focusers Provides a rigid 2.0"-24TPI male threaded connection Designed for the FLI CFW2-7 Filter Whe...

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Starlight Instruments 3.5" End Cap for SBIG and FLI 5 Series/CCD Camera & Filter Wheels

Adapts 3.5" Feather Touch focusers Provides a 3.0"x24tpi male thread connection Designed for FLI 5 Series (CFW 5-7) filter wheels Compatible with ...

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Starlight Instruments 3.5" End Cap for Sky-Watcher M65 Male Threaded Accessories

Adapts 3.5" Feather Touch Focusers to Sky-Watcher accessories Provides a secure M65x1 female threaded connection Eliminates sag and tilt common wi...

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Starlight Instruments 3.5" End Cap for Stellarvue Field Flattener

Connects 3.5" Feather Touch Focusers Designed for the Stellarvue 85mm Field Flattener Machined from High-Quality Aluminum Description FAQ Speci...

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Starlight Instruments 3.5" End Cap for Takahashi 72mm Male Threaded Accessories

Adapts 3.5" Feather Touch focusers to accept Takahashi accessories Provides a female 72mm x 1mm threaded interface Ensures a rigid, non-flexing co...

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Starlight Instruments 3.5" End Cap for Takahashi Large Field Flattener

Connects 3.5" Feather Touch focusers to specific Takahashi large field flatteners Features an M92x1 thread for a secure, rigid connection Compatib...

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Starlight Instruments 3.5" End Cap for William Optics Male Threaded Accessories

Adapts 3.5" Feather Touch focusers to William Optics accessories Provides a secure M92x1mm female threaded connection Machined from high-grade alu...

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Starlight Instruments 3.5" End Cap w/ 2.0" Compression Ring Opening

Adapts 3.5" Feather Touch focusers to use 2.0" accessories Features a secure, non-marring compression ring Secured by multiple machined thumb scre...

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Starlight Instruments 3.5" End Cap w/ 3.0" Compression Ring Opening

Adapts 3.5" Feather Touch focusers to accept 3.0" accessories 3.0" compression ring opening for 3.0" accessories Ideal for heavy imaging trains wi...

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Starlight Instruments 3.5" End Cap w/ 3.5" Compression Ring Opening

Adapts 3.5" Feather Touch focusers for 3.5" slip-fit accessories Features a 3.5" compression ring opening Provides a secure hold for heavy eyepiec...

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Original price $210.00 USD - Original price $210.00 USD
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Original price $190.00 USD - Original price $190.00 USD
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Starlight Instruments 3.5" End Cap w/ M48X.75 Threads

Attaches to 3.5" Feather Touch focusers Provides a male M48x0.75 threaded connection Direct thread connection for M48x0.75 accessories For field f...

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Starlight Instruments 6-32 Thumb Screw

Machined 6-32 thumb screw Enables tool-free focuser rotation Available in 1.25", 2.0", and 2.5" shaft lengths Improves ergonomics, especially with...

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Original price $10.00 USD - Original price $10.00 USD
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The Feather Touch System and Its Adapters

Starlight's approach is modular: a focuser body, a telescope-specific adapter that mounts it, and a set of drawtube terminations and motor options that adapt it to your workflow.

  • Feather Touch focusers: Dual-speed rack-and-pinion drawtubes with 10:1 fine focus, rated to hold heavy imaging trains without slip at any tube angle.
  • Telescope-specific adapters: Machined mounting plates for a very large range of refractors, Newtonians and Schmidt-Cassegrains, holding the focuser square to the optical axis.
  • Micro Focusers: Retrofit 10:1 reduction units that add fine focus to an existing stock focuser at a fraction of the cost of full replacement.
  • Drawtube terminations: Threaded end pieces that convert the focuser output to standard imaging threads, giving a clean, rigid base for the rest of the train.
  • Motor and controller options: Stepper drives and handsets that add absolute positioning and autofocus capability to a Feather Touch body.
  • Compression rings and clamps: Even radial clamping in place of single set screws, which removes both barrel marking and induced tilt.

Why Choose David Astro for Starlight Instruments

Starlight's catalogue is precise and dense with part numbers. Selecting from it correctly is most of the work.

  • Adapter identification: We match the focuser to your specific telescope's adapter, which is the step that most often goes wrong when ordering unassisted.
  • Focus travel checked: We verify that the replacement focuser's profile height still lets your telescope reach focus with your intended camera or diagonal.
  • Authorized dealer: Genuine Starlight Instruments products with full manufacturer warranty, handled inside Canada.
  • Held in Canadian stock: A deep on-hand selection, shipped domestically with no duties or brokerage fees for Canadian customers.
  • In-house service: Fitting advice, retrofit support and diagnostics after the sale.

Starlight Instruments in Canada — Frequently Asked Questions

Do I need the focuser or just the Micro Focuser?
If your stock focuser holds your load without slipping and you only want finer control, a Micro Focuser retrofit is the economical answer. If the drawtube slips or flexes under an imaging train, replace the focuser.
Will a Feather Touch fit my telescope?
Starlight makes adapters for a very wide range of tubes, including many discontinued models. Send us the make, model and drawtube diameter and we will confirm the exact adapter part.
Can I motorize a Feather Touch later?
Yes. The system is designed for it, and motor kits attach to the fine-focus shaft without replacing the body, so buying manual first and adding drive later is a reasonable path.
Is the warranty handled in Canada?
Yes. As an authorized dealer we handle warranty claims and service domestically, so nothing has to cross a border for support.

Fitting a Feather Touch?

Send us your telescope model and we will specify the focuser and adapter. Canadian stock, full warranty.