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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

Parts and Accessories

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Starlight Instruments 3.5" Diameter Riser, Adds 3.35" to Length
$150.00 - $150.00
$150.00
$150.00 - $150.00
$150.00

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

SI-R35-3.35

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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$150.00 - $150.00
$150.00
$150.00 - $150.00
$150.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00

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

SI-EC35-505AP

Adapts 3.5" Feather Touch focusers to Astro-Physics accessories Provides a secure 2.7" x 24 tpi female threaded connection Eliminates flexure and ...

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$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$220.00 - $220.00
$220.00
$220.00 - $220.00
$220.00

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

SI-EC35-505

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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$220.00 - $220.00
$220.00
$220.00 - $220.00
$220.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00

Starlight Instruments 3.5" End Cap for APM/TMB Reducer

SI-EC35-505-82

Connects 3.5" Feather Touch Focusers Adapts APM/TMB .75x Reducers Thread Specification: M82x1 Female Material: High-Grade Aluminum Machined In-Hou...

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$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$190.00 - $190.00
$190.00
$190.00 - $190.00
$190.00

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

SI-EC35-505-13

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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$190.00 - $190.00
$190.00
$190.00 - $190.00
$190.00
$190.00 - $190.00
$190.00
$190.00 - $190.00
$190.00

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

SI-EC35-505-12

Adapts 3.5" Feather Touch focusers Provides a 3.0"x24tpi male thread connection Designed for FLI Proline and 5 Series cameras Compatible with sele...

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$190.00 - $190.00
$190.00
$190.00 - $190.00
$190.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00

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

SI-EC35-505-65

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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$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00

Starlight Instruments 3.5" End Cap for Stellarvue Field Flattener

SI-EC35-505-85

Connects 3.5" Feather Touch Focusers Designed for the Stellarvue 85mm Field Flattener Features M85x1 Female Threads Machined from High-Quality Alu...

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$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00

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

SI-EC35-505-72

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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$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00

Starlight Instruments 3.5" End Cap for Takahashi Large Field Flattener

SI-EC35-505-1

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

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$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00

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

SI-EC35-505-11

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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$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00

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

SI-EC35-505CR

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

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$160.00 - $160.00
$160.00
$160.00 - $160.00
$160.00
$200.00 - $200.00
$200.00
$200.00 - $200.00
$200.00

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

SI-EC35-505-3CR

Adapts 3.5" Feather Touch focusers to accept 3.0" accessories Provides a secure, non-marring grip with a brass compression ring Ideal for heavy im...

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$200.00 - $200.00
$200.00
$200.00 - $200.00
$200.00
$210.00 - $210.00
$210.00
$210.00 - $210.00
$210.00

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

SI-EC35-505-3.5CR

Adapts 3.5" Feather Touch focusers for 3.5" slip-fit accessories Features a non-marring brass compression ring Provides a secure hold for heavy ey...

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$210.00 - $210.00
$210.00
$210.00 - $210.00
$210.00
$190.00 - $190.00
$190.00
$190.00 - $190.00
$190.00

Starlight Instruments 3.5" End Cap w/ M48X.75 Threads

SI-EC35-505-14

Attaches to 3.5" Feather Touch focusers Provides a male M48x0.75 threaded connection Creates a rigid, zero-flexure imaging train Ideal for heavy c...

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$190.00 - $190.00
$190.00
$190.00 - $190.00
$190.00
$10.00 - $10.00
$10.00
$10.00 - $10.00
$10.00

Starlight Instruments 6-32 Thumb Screw

SI-TS-222 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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$10.00 - $10.00
$10.00
$10.00 - $10.00
$10.00
$250.00 - $250.00
$250.00
$250.00 - $250.00
$250.00

Starlight Instruments Adapter for Sky-Watcher Esprit 100mm Telescopes

SI-A30-1903-102

Adapts Starlight Instruments focusers to Sky-Watcher Esprit 100mm telescopes Custom-engineered to prevent drawtube collision with internal optics ...

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$250.00 - $250.00
$250.00
$250.00 - $250.00
$250.00
$40.00 - $40.00
$40.00
$40.00 - $40.00
$40.00

Starlight Instruments Circuit Board Upgrade for Controlling 2 Focusers at the Same Time

SI-FB-II 2nd FOCUSER

Enables Control of 2 Focusers Simultaneously Designed for the Starlight Instruments Focuser Boss II Controller Streamlines Dual-Telescope and Guid...

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$40.00 - $40.00
$40.00
$40.00 - $40.00
$40.00
$80.00 - $80.00
$80.00
$80.00 - $80.00
$80.00

Starlight Instruments Eyepiece Adapter "Easy Grip" w/ Compression Ring (Fits 1.25" Eyepieces)

SI-EA20-205EG

Adapts 2" focusers and diagonals to use 1.25" eyepieces "Easy Grip" knurled exterior for secure handling, even with gloves Non-marring brass compr...

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$80.00 - $80.00
$80.00
$80.00 - $80.00
$80.00
$80.00 - $80.00
$80.00
$80.00 - $80.00
$80.00

Starlight Instruments Eyepiece Adapter Flush Mount w/ Compression Ring (Fits 1.25" Eyepieces)

SI-EA20-205LP

Adapts 2-inch focusers and diagonals to accept 1.25-inch eyepieces Flush-mount design provides a minimal profile for focus-critical setups Brass c...

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$80.00 - $80.00
$80.00
$80.00 - $80.00
$80.00
$110.00 - $110.00
$110.00
$110.00 - $110.00
$110.00

Starlight Instruments Eyepiece Adapter for Celestron/Meade 6.3 Focal Reducer

SI-EA20-2.24
1 in stock

Connects eyepieces to Celestron/Meade f/6.3 Focal Reducers Enables wide-field visual observation with SCTs Precision-machined for a secure, non-fl...

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$110.00 - $110.00
$110.00
$110.00 - $110.00
$110.00
$270.00 - $270.00
$270.00
$270.00 - $270.00
$270.00

Starlight Instruments Eyepiece Adapter for Leica Eyepiece

SI-EA20-EP2-L-37

Adapts select Leica eyepieces for astronomical use Precision-machined by Starlight Instruments for a secure fit Enables use of premium spotting sc...

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$270.00 - $270.00
$270.00
$270.00 - $270.00
$270.00
$110.00 - $110.00
$110.00
$110.00 - $110.00
$110.00

Starlight Instruments Eyepiece Adapter for Vixen Focal Reducer

SI-EA20-205-60

Connects Vixen Focal Reducers to 2.0" eyepiece holders Standard 2.0" barrel diameter for universal compatibility Machined by Starlight Instruments...

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$110.00 - $110.00
$110.00
$110.00 - $110.00
$110.00
Starlight Instruments Eyepiece Adapter w/ Bayonet Release for Leica Eyepiece
$240.00 - $240.00
$240.00
$240.00 - $240.00
$240.00

Starlight Instruments Eyepiece Adapter w/ Bayonet Release for Leica Eyepiece

SI-EA20-EP2-L-40

Bayonet-Style Quick Release Exclusively for Leica Eyepieces Secure, Positive-Locking Mechanism Single-Action Twist to Lock and Unlock Eliminates T...

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$240.00 - $240.00
$240.00
$240.00 - $240.00
$240.00