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Spacer Rings, Extenders, and Telescope Adapters

Spacer rings, extension tubes, and adapters for telescopes are essential imaging accessories for achieving precise back focus and a perfect fit between your optical instruments. These devices compensate for variations in distance between the telescope and cameras or accessories, ensuring optimal focus for astrophotography and visual observation.

Available in a wide range of formats and sizes, these rings and adapters are compatible with most telescopes and DSLR, mirrorless, or CCD cameras. Extenders and spacer rings also allow you to adjust the sensor position to achieve the best focal plane, a critical factor for capturing sharp, detailed images of celestial objects. To complete your setup, explore our full range of adapters, extension tubes, and spacers, including T-rings, T-mounts, T-adapters, and much more.

At Astronomy Plus, we offer a carefully curated selection of reliable and easy-to-install extension tubes, spacers, and adapters for telescopes. Choosing the right accessory ensures a precise fit for your equipment, preserves the integrity of your instruments, and optimizes your astrophotography sessions, whether you’re a beginner or an experienced observer, allowing you to fully harness your telescope’s potential.

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ZWO Sony NEX Lens to ASI Small-Sensor Camera Adapter (SONY-NEX) - Astronomy Plus
ZWO Sony NEX Lens to ASI Small-Sensor Camera Adapter (SONY-NEX) - Astronomy Plus Save $4.00 Save $0.00
$49.00
$49.00 - $49.00
$49.00
$45.00
$45.00 - $45.00
$45.00

ZWO Sony NEX Lens to ASI Small-Sensor Camera Adapter (SONY-NEX)

ZWO

ZWO Sony NEX Lens to ASI Small-Sensor Camera Adapter If you are looking to connect a Sony NEX lens to an ASI small-sensor camera, this is the ad...

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$49.00
$49.00 - $49.00
$49.00
$45.00
$45.00 - $45.00
$45.00
Save $4.00 Save $0.00
Baader Hyperion T-Adapter M43i/T-2a (M42x0.75) (2958080) - Astronomy Plus
Baader Hyperion T-Adapter M43i/T-2a (M42x0.75) (2958080) - Astronomy Plus
$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00

Baader Hyperion T-Adapter M43i/T-2a (M42x0.75) (2958080)

Baader Planetarium

Baader Hyperion T-Adapter M43i/T-2a (M42x0.75) To connect DSLR T-rings Connection to the Astro T-2 system for classical eyepiece projection For Hy...

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$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00
William Optics 2" to 1.25" RotoLock Eyepiece Adapter - Gold (F-ROTO-A2-125GDII) - Astronomy Plus
William Optics 2" to 1.25" RotoLock Eyepiece Adapter - Gold (F-ROTO-A2-125GDII) - Astronomy Plus
$80.00 - $80.00
$80.00
$80.00 - $80.00
$80.00

William Optics 2" to 1.25" RotoLock Eyepiece Adapter

William Optics

William Optics 2" to 1.25" RotoLock Eyepiece Adapter  The new RotoLock series of adapters from William Optics may well set the "gold' standard for ...

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$80.00 - $80.00
$80.00
$80.00 - $80.00
$80.00
Pegasus Adapter M54 Male to M48 Female (ADAPT-M54M-M48F) - Astronomy Plus
$34.00 - $34.00
$34.00
$34.00 - $34.00
$34.00

Pegasus Adapter M54 Male to M48 Female (ADAPT-M54M-M48F)

Pegasus

Pegasus Adapter M54 Male to M48 Female Adapter Thickness: 2.0mm Thread: Pitch 0.75mm / 4 mm length In the Box Peagsus Adapter M54 Male to M48 Fe...

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$34.00 - $34.00
$34.00
$34.00 - $34.00
$34.00
Antares M48-M42 Camera Adapter (M48-M42) - Astronomy Plus
$17.00 - $17.00
$17.00
$17.00 - $17.00
$17.00

Antares M48-M42 Camera Adapter (M48-M42)

Antares

Antares M48-M42 Camera Adapter M48-M42 reduces female M48 to female M42 In the Box Antares M48-M42 Camera Adapter Warranty & Manuals Antares ...

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$17.00 - $17.00
$17.00
$17.00 - $17.00
$17.00
Antares SCT Adapter Twist-Lock 2" (T2TL) - Astronomy Plus
$50.00 - $50.00
$50.00
$50.00 - $50.00
$50.00

Antares SCT Adapter Twist-Lock 2" (T2TL)

Antares

Antares SCT Adapter Twist-Lock 2" Tired of threading your Schmidt-Cassegrain accessories on and off? Switch to a smooth 2" barrel with a T2TL Twist...

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$50.00 - $50.00
$50.00
$50.00 - $50.00
$50.00
Antares M42 Camera Adapter 1.25" (DP1) - Astronomy Plus
$18.00 - $18.00
$18.00
$18.00 - $18.00
$18.00

Antares M42 Camera Adapter 1.25" (DP1)

Antares

Antares M42 Camera Adapter 1.25" DP1 adapts your 1.25" focuser or diagonal directly to M42 T-Thread. Threaded for filters.   In the Box Antares M42...

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$18.00 - $18.00
$18.00
$18.00 - $18.00
$18.00
Tele Vue 2" Extension Tube (X2C-0008) - Astronomy Plus
$109.00 - $109.00
$109.00
$109.00 - $109.00
$109.00

Tele Vue 2" Extension Tube (X2C-0008)

Tele Vue

Tele Vue 2" Extension Tube The Tele Vue 2″ Extension Tube helps your telescope reach focus when not using a diagonal — as is the case in many imagi...

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$109.00 - $109.00
$109.00
$109.00 - $109.00
$109.00
Astronomy Plus M54 T Adapter for LARGE SCT EDGE HD (9.25/11/14) (TA664) Astronomy Plus
$95.00 - $95.00
$95.00
$95.00 - $95.00
$95.00

Astronomy Plus M54 T Adapter for LARGE SCT EDGE HD (9.25/11/14) (TA664)

Astronomy Plus

Astronomy Plus M54 T Adapter for LARGE SCT EDGE HD (9.25/11/14)   This T-Adapter is designed to connect your Celestron C925HD, C11HD, or C14HD Edge...

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$95.00 - $95.00
$95.00
$95.00 - $95.00
$95.00
Astronomy Plus M42M to M48F Adapter (TA462) Astronomy Plus
Astronomy Plus M42M to M48F Adapter (TA462) Astronomy Plus
$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00

Astronomy Plus M42M to M48F Adapter (TA462)

Astronomy Plus

Astronomy Plus M42M to M48F Adapter M42M to M48F metallic adapter. Adds 1mm of back Focus Technical Specifications Connection Side A M42 x 0.75 ...

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$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00
$21.00 - $31.00
$21.00 - $31.00
$21.00 - $31.00
$21.00

Astronomy Plus M68x1 Metal Extension Tube (TA457)

Astronomy Plus

Astronomy Plus M68*1 Metal Focal Length Extension Tube Elevate your astronomy game with our Astronomy Plus M68x1 Metal Focal Length Extension Tube ...

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$21.00 - $31.00
$21.00 - $31.00
$21.00 - $31.00
$21.00
$91.00 - $91.00
$91.00
$91.00 - $91.00
$91.00

Askar Heightening Modules for SQA OTA's (HEIM)

Askar

Askar Heightening Modules for SQA OTA's Optional SQA series heightening section, can be used with most SQA series OTAs. The all-metallic heighteni...

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$91.00 - $91.00
$91.00
$91.00 - $91.00
$91.00
$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00

Antares 1.25"x1.75" Barrel Extension (ET1-S)

Antares

Antares 1.25"x1.75" Barrel Extension ET1-S is a slightly shorter tube of the ET1 1.25"x1.75" extension tube with screw retainer. Threaded for 1.25"...

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$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00
Artesky Vixen Dovetail 5.5cm with 3/8" Screw (ART8250) Artesky
$24.00 - $24.00
$24.00
$24.00 - $24.00
$24.00

Artesky Vixen Dovetail 5.5cm with 3/8" Screw (ART8250)

Artesky

Artesky Vixen Dovetail 5.5cm with 3/8" Screw Compact 5.5cm and very useful bar for connecting small accessories or reflex cameras with 3/8" photogr...

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$24.00 - $24.00
$24.00
$24.00 - $24.00
$24.00
$133.00 - $133.00
$133.00
$133.00 - $133.00
$133.00

PrimaluceLab 2" Adapter ESATTO 2" LP for ARCO 2" (PL3600538)

PrimaluceLab

PrimaluceLab 2" Adapter ESATTO 2" LP for ARCO 2" Adapter ESATTO 2" LP for ARCO 2" allows you to connect the rotator to ESATTO 2" LP robotic focuser...

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$133.00 - $133.00
$133.00
$133.00 - $133.00
$133.00
SVBONY M48 to M42 Knurling Design Adapter (W9100A) - Astronomy Plus
SVBONY M48 to M42 Knurling Design Adapter (W9100A) - Astronomy Plus
$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00

SVBONY M48 to M42 Knurling Design Adapter (W9100A)

Svbony

SVBONY SV130 M48 to M42 Knurling Design Adapter SV130 black M48 to M42 knurling design telescope adapter Features All metal construction and anod...

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$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00
SVBONY Camera Adapter for SCT& (W9127A) - Astronomy Plus
SVBONY Camera Adapter for SCT& (W9127A) - Astronomy Plus
$25.00 - $25.00
$25.00
$25.00 - $25.00
$25.00

SVBONY Camera Adapter for SCT (W9127A)

Svbony

SVBONY SV167 Camera Adapter for SCT  SVBONY SV167 is a T-adapter attaches an SLR or DSLR camera to a SCT for prime focus photography. T-threads ac...

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$25.00 - $25.00
$25.00
$25.00 - $25.00
$25.00
ZWO Adapter - Nikon Lens to 2" Filter Wheel (EFW2-Nikon) - Astronomy Plus
ZWO Adapter - Nikon Lens to 2" Filter Wheel (EFW2-Nikon) - Astronomy Plus
Save $10.00 Save $0.00
$97.00
$97.00 - $97.00
$97.00
$87.00
$87.00 - $87.00
$87.00

ZWO Adapter - Nikon Lens to 2" Filter Wheel (EFW2-Nikon)

ZWO

ZWO Adapter - Nikon Lens to 2" Filter Wheel This adapter from ZWO allows for Nikon lenses to be used with 2-inch filter wheels (EFW). The interface...

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$97.00
$97.00 - $97.00
$97.00
$87.00
$87.00 - $87.00
$87.00
Save $10.00 Save $0.00
Baader Adapter M54 internal to M48 external (M54F/M48E) - Astronomy Plus
Baader Adapter M54 internal to M48 external (M54F/M48E) - Astronomy Plus
$53.00 - $53.00
$53.00
$53.00 - $53.00
$53.00

Baader Adapter M54 internal to M48 external (M54F/M48E)

Baader Planetarium

Baader Adapter M54 internal to M48 external (M54F/M48E) Reducing Adapter M54 to M48 with M54 female thread Changes the M54 male thread of an adapt...

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$53.00 - $53.00
$53.00
$53.00 - $53.00
$53.00
QHY Adapter Kit - Combo D1-D2-D3 - Astronomy Plus
QHY Adapter Kit - Combo D1-D2-D3 - Astronomy Plus
$57.00 - $82.00
$57.00 - $82.00
$57.00 - $82.00
$57.00

QHY Adapter Kit - Combo D1-D2-D3

QHYCCD

QHY Adapter Kit Combo D1 The Combo D1 adapter kit from QHY is compatible with the: QHY268C QHY600C QHY168C QHY247C QHY128C QHY410C QHY367C This k...

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$57.00 - $82.00
$57.00 - $82.00
$57.00 - $82.00
$57.00
Takahashi T-Ring DX Premium - Astronomy Plus
Takahashi T-Ring DX Premium - Astronomy Plus
$180.00 - $195.00
$180.00 - $195.00
$180.00 - $195.00
$180.00

Takahashi T-Ring DX Premium

Takahashi

Takahashi T-Ring DX Premium Takahashi offers three different series of bayonet rings, whereby these three series differ in the connection thread on...

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$180.00 - $195.00
$180.00 - $195.00
$180.00 - $195.00
$180.00
$133.00 - $133.00
$133.00
$133.00 - $133.00
$133.00

Takahashi Spacer for TOA 130F (TKA31584)

Takahashi

Takahashi Spacer for TOA 130F  Takahashi M92 extension ring, is required, among other things, for the 67 flattener when used on the TOA-130F.Telesc...

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$133.00 - $133.00
$133.00
$133.00 - $133.00
$133.00
SVBONY SV196 T2 Lens Mount Adapter for Sony Alpha DSLR (W9153A) - Astronomy Plus
SVBONY SV196 T2 Lens Mount Adapter for Sony Alpha DSLR (W9153A) - Astronomy Plus
$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00

SVBONY T-Ring Adapter for Sony Alpha DSLR (W9153A)

Svbony

SVBONY SV196 T-Ring Adapter for Sony Alpha DSLR Allowing you to fit any T2 mount lens or accessory to your Sony Alpha or Minolta AF DSLR camera. 1....

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$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00
Svbony SV123 Spotting Scope Camera Adapter Extension Tube (F9194A) - Astronomy Plus
Svbony SV123 Spotting Scope Camera Adapter Extension Tube (F9194A) - Astronomy Plus
$33.00 - $33.00
$33.00
$33.00 - $33.00
$33.00

Svbony SV123 Spotting Scope Camera Adapter Extension Tube (F9194A)

Svbony

Svbony SV123 Spotting Scope Camera Adapter Extension Tube Svbony Spotting Scope Photo Adapter for DSLR Camera (Connect your Camera to Spotting Sco...

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$33.00 - $33.00
$33.00
$33.00 - $33.00
$33.00
Antares Adapter 2" to 2" Extension (ET2) - Astronomy Plus
$49.00 - $49.00
$49.00
$49.00 - $49.00
$49.00

Antares Adapter 2" to 2" Extension (ET2)

Antares

Antares Adapter 2" to 2" Extension ET2 extends any 2" accessory by 2". Accepts 2" filters. Double side screw with pressure band.   Technical Speci...

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$49.00 - $49.00
$49.00
$49.00 - $49.00
$49.00
Starizona HyperStar ZWO Filter Drawer Adapter for ZWO Cooled Cameras - Astronomy Plus
$98.00 - $98.00
$98.00
$98.00 - $98.00
$98.00

Starizona HyperStar ZWO Filter Drawer Adapter for ZWO Cooled Cameras

Starizona

Starizona HyperStar 8/6 ZWO Filter Drawer Adapter for ZWO Cooled Cameras HyperStar 8 / 6 ZWO Filter Drawer Adapter for ZWO Cooled Cameras In the Bo...

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$98.00 - $98.00
$98.00
$98.00 - $98.00
$98.00
Starizona PE200 to EQ6 Tripod Adapter for Extra Stability (PE200-EQ6A) Starizona
Starizona PE200 to EQ6 Tripod Adapter for Extra Stability (PE200-EQ6A) Starizona
$55.00 - $55.00
$55.00
$55.00 - $55.00
$55.00

Starizona PE200 to EQ6 Tripod Adapter for Extra Stability (PE200-EQ6A)

Starizona

Starizona PE200 to EQ6 Tripod Adapter  Use this adapter to attach a ZWO PE200 pier extension to a Skywatcher EQ6 tripod. It works with either a sta...

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$55.00 - $55.00
$55.00
$55.00 - $55.00
$55.00
Astronomy Plus SCT Female to M42M Adapter (TA49) Astronomy Plus
Astronomy Plus SCT Female to M42M Adapter (TA49) Astronomy Plus
$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00

Astronomy Plus SCT Female to M42M Adapter (TA49)

Astronomy Plus

Astronomy Plus SCT Female to M42M Adapter SCT Female to M42M metallic adapter. Adds 2 mm of back spacing Technical Specifications Connection Sid...

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$11.00 - $11.00
$11.00
$11.00 - $11.00
$11.00
Astronomy Plus M54F to M42F Adapter (TA211) Astronomy Plus
Astronomy Plus M54F to M42F Adapter (TA211) Astronomy Plus
$12.00 - $12.00
$12.00
$12.00 - $12.00
$12.00

Astronomy Plus M54F to M42F Adapter (TA211)

Astronomy Plus

Astronomy Plus M54F to M42F Adapter  M54F to M42F metallic adapter. Adds 0 mm of back Focus Technical Specifications Connection Side A M54 x 0.7...

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$12.00 - $12.00
$12.00
$12.00 - $12.00
$12.00
Astronomy Plus M54M to M42F Adapter (TA210) Astronomy Plus
Astronomy Plus M54M to M42F Adapter (TA210) Astronomy Plus
$12.00 - $12.00
$12.00
$12.00 - $12.00
$12.00

Astronomy Plus M54M to M42F Adapter (TA210)

Astronomy Plus

Astronomy Plus M54M to M42F Adapter M54M to M42F metallic adapter. Adds 0 mm of back Focus Technical Specifications Connection Side A M54 x 0.75...

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$12.00 - $12.00
$12.00
$12.00 - $12.00
$12.00
Astronomy Plus M54M to M48F Adapter (TA57) Astronomy Plus
Astronomy Plus M54M to M48F Adapter (TA57) Astronomy Plus
$12.00 - $12.00
$12.00
$12.00 - $12.00
$12.00

Astronomy Plus M54M to M48F Adapter (TA57)

Astronomy Plus

Astronomy Plus M54M to M48F Adapter M54M to M48F metallic adapter. Adds 2 mm of back Focus Technical Specifications Connection Side A M54 x 0.75...

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$12.00 - $12.00
$12.00
$12.00 - $12.00
$12.00
Pegasus Astro M68 Male to M42 Female Pegasus
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00

Pegasus Astro M68 Male to M42 Female

Pegasus

Pegasus Astro M68 Male to M42 Female  Adapter (Backfocus) Thickness: 1.4 mm M68 Thread: Pitch 1.0mm / 4mm length M42 Thread Pitch 0.75mm Technica...

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$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00
Pegasus Astro M68 Male to M48 Male (M42 inner hole) Pegasus
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00

Pegasus Astro M68 Male to M48 Male (M42 inner hole)

Pegasus

Pegasus Astro M68 Male to M48 Male (M42 inner hole) Adapter (Backfocus) Thickness: 1.4 mm M68 Thread: Pitch 1.0mm / 4mm length M48 Thread Pitch 0....

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$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00
Antares SCT 1.25" Twist Lock Adapter (SCTTL) Antares
$52.00 - $52.00
$52.00
$52.00 - $52.00
$52.00

Antares SCT 1.25" Twist Lock Adapter (SCTTL)

Antares

Antares SCT 1.25" Twist Lock Adapter New from Antares - Female SCT thread (visual back) with 1.25" twist lock eyepiece holder # SCT-TL Features st...

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$52.00 - $52.00
$52.00
$52.00 - $52.00
$52.00
SVBONY SCT to 2inch Eyepiece Adapter (W9120A) - Astronomy Plus
SVBONY SCT to 2inch Eyepiece Adapter (W9120A) - Astronomy Plus
$16.00 - $16.00
$16.00
$16.00 - $16.00
$16.00

SVBONY SCT to 2inch Eyepiece Adapter (W9120A)

Svbony

SVBONY SV159 SCT to 2inch Eyepiece Adapter SVBONY SV159 SCT to 2" Eyepiece suitable for all schmidt-cassegrains telescope Brass Ring inside the tu...

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$16.00 - $16.00
$16.00
$16.00 - $16.00
$16.00
Buckeye Seestar Filter Adapter - Astronomy Plus
Buckeye Seestar Filter Adapter - Astronomy Plus
Save up to $15.60 Save $0.00
$21.00 - $39.00
$21.00 - $39.00
$21.00
$12.60 - $23.40
$12.60 - $23.40
$12.60

Buckeye Seestar S50 Filter Adapter

Buckeye Stargazer

Buckeye Seestar S50 Filter Adapter These filter holders are meant for M48x0.75 threaded filters. However, it appears as though Baader filters will ...

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$21.00 - $39.00
$21.00 - $39.00
$21.00
$12.60 - $23.40
$12.60 - $23.40
$12.60
Save up to $15.60 Save $0.00
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