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Enjoy Free Shipping on Orders Over $500 + Same-Day Dispatch (Before 3 PM*) *Some exclusions apply

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.

Original price $42.00 - Original price $42.00
Original price
$42.00
$42.00 - $42.00
Current price $42.00

Pegasus Astro M54 Male to 2” Nosepiece (inner hole with 2” filter thread) (ADAPT-M54M-2NP)

Pegasus

Pegasus Astro M54 Male to 2” Nosepiece (inner hole with 2” filter thread)  Total Nosepiece Length :35mm Adapter Thickness : 1.5mm Thread: Pitch 0....

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Original price $42.00 - Original price $42.00
Original price
$42.00
$42.00 - $42.00
Current price $42.00
Original price $164.00 - Original price $164.00
Original price
$164.00
$164.00 - $164.00
Current price $164.00

William Optics Camera Angle Rotator for 2” M54 Focuser (M-CAA54)

William Optics

Camera Angle Rotator for 2” M54 Focuser All New Camera Angle Rotator for 2” M54 Focuser Fits : Z61 and all other brand Focuser with M54 threads. In...

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Original price $164.00 - Original price $164.00
Original price
$164.00
$164.00 - $164.00
Current price $164.00
Original price $80.00 - Original price $80.00
Original price
$80.00
$80.00 - $80.00
Current price $80.00

William Optics Longer Adjusting Adapter for FLAT68III, FLAT7A (AD-M80-45-M48)

William Optics

William Optics Longer Adjusting Adapter for FLAT68III, FLAT7A This adjustable adapter offers a convenient, efficient way to upgrade your WO diagona...

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Original price $80.00 - Original price $80.00
Original price
$80.00
$80.00 - $80.00
Current price $80.00
Original price $28.00 - Original price $28.00
Original price
$28.00
$28.00 - $28.00
Current price $28.00

Antares Adapter for Maksutov-Cassegrain, SCT (SCTMC)

Antares

Antares Adapter for Maksutov-Cassegrain And SCT Do you want the full repertoire of Schmidt-Cassegrain accessories for your Maksutov-Cassegrain? Jus...

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Original price $28.00 - Original price $28.00
Original price
$28.00
$28.00 - $28.00
Current price $28.00
Original price $109.00 - Original price $109.00
Original price
$109.00
$109.00 - $109.00
Current price $109.00

Tele Vue 3.5" Extension Tube (X3C-0009)

Tele Vue

Tele Vue 3.5" Extension Tube The Tele Vue 3.5″ Extension Tube helps your telescope reach focus when not using a diagonal — as is the case in many i...

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Original price $109.00 - Original price $109.00
Original price
$109.00
$109.00 - $109.00
Current price $109.00
Original price $40.00 - Original price $40.00
Original price
$40.00
$40.00 - $40.00
Current price $40.00

Sky-Watcher Nikon M48 T-Ring (S20301)

Sky-Watcher

Sky-Watcher Nikon M48 T-Ring Designed for attaching a Nikon DSLR camera to any of the Sky-Watcher 0.85x Focal Reducer/Correctors.M48 rings are u...

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Original price $40.00 - Original price $40.00
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$40.00
$40.00 - $40.00
Current price $40.00
Original price $109.00 - Original price $286.00
Original price
$109.00 - $286.00
$109.00 - $286.00
Current price $109.00

Pegasus Astro Prodigy Microfocuser Telescope Adapters

Pegasus

Pegasus Astro Prodigy Microfocuser Telescope Adapters Adapter for SCT 2" SCT 2-inchCan be used with SCT 2”telescopes (for 2” male thread telescop...

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Original price $109.00 - Original price $286.00
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$109.00 - $286.00
Current price $109.00
Original price $410.00 - Original price $488.00
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$410.00 - $488.00
Current price $410.00

PlaneWave SecureFit Spacers For CDK 14,17,20, & 24

Planewave

PlaneWave SecureFit Spacers For CDK 14,17,20, & 24 When you need a secure way to attach a CCD camera at the image plane of a CDK telescope, the...

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Original price $410.00 - Original price $488.00
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$410.00 - $488.00
Current price $410.00
Original price $34.00 - Original price $47.00
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$34.00 - $47.00
Current price $34.00

Baader M48 Extension Tube

Baader Planetarium

Baader M48 Extension Tube  Used to adjust the working distance of larger cameras and similar accessories with M48 thread Telescope side M48 intern...

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Original price $34.00 - Original price $47.00
Original price
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$34.00 - $47.00
Current price $34.00
Original price $39.00 - Original price $39.00
Original price
$39.00
$39.00 - $39.00
Current price $39.00

Pegasus Astro M68 Male to M63 Male

Pegasus

Pegasus Astro M68 Male to M63 Male Adapter (Backfocus) Thickness: 1.4 mm Thread: Pitch 1.0mm / 4 mm length For Ricardi M63 Reducer & WO Reduce...

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Original price $39.00 - Original price $39.00
Original price
$39.00
$39.00 - $39.00
Current price $39.00
Original price $30.00 - Original price $30.00
Original price
$30.00
$30.00 - $30.00
Current price $30.00

Astronomy Plus 1.25'' M42 Variable Extension Tube (TA11)

Astronomy Plus

Astronomy Plus 1.25'' M42 Variable Extension Tube Elevate your astronomy game with our metallic M42*0.75 variable Focal Length Extension Tube. Enha...

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Original price $30.00 - Original price $30.00
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$30.00
$30.00 - $30.00
Current price $30.00
Original price $14.00 - Original price $14.00
Original price
$14.00
$14.00 - $14.00
Current price $14.00

Astronomy Plus M42F to M54M Adapter (TA471)

Astronomy Plus

Astronomy Plus M42F to M54M Adapter M42F to M54M metallic adapter. Adds 0 mm of back Focus Technical Specifications Connection Side A M42 x 0.75...

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Original price $14.00 - Original price $14.00
Original price
$14.00
$14.00 - $14.00
Current price $14.00
Original price $12.00 - Original price $12.00
Original price
$12.00
$12.00 - $12.00
Current price $12.00

Astronomy Plus M54F to M48F Adapter (TA208)

Astronomy Plus

Astronomy Plus M54F to M48F Adapter  M54F to M48F metallic adapter. Adds 0 mm of back Focus Technical Specifications Connection Side A M54 x 0.7...

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Original price $12.00 - Original price $12.00
Original price
$12.00
$12.00 - $12.00
Current price $12.00
Original price $12.00 - Original price $12.00
Original price
$12.00
$12.00 - $12.00
Current price $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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Original price $12.00 - Original price $12.00
Original price
$12.00
$12.00 - $12.00
Current price $12.00
Original price $11.00 - Original price $11.00
Original price
$11.00
$11.00 - $11.00
Current price $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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Original price $11.00 - Original price $11.00
Original price
$11.00
$11.00 - $11.00
Current price $11.00
Original price $11.00 - Original price $11.00
Original price
$11.00
$11.00 - $11.00
Current price $11.00

Astronomy Plus SCT Male to M48M Adapter (TA50)

Astronomy Plus

Astronomy Plus SCT Male to M48M Adapter SCT Male to M48M metallic adapter. Adds 2mm of back Focus Technical Specifications Connection Side A SCT...

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Original price $11.00 - Original price $11.00
Original price
$11.00
$11.00 - $11.00
Current price $11.00
Original price $11.00 - Original price $11.00
Original price
$11.00
$11.00 - $11.00
Current price $11.00

Astronomy Plus SCT Male to M42M Adapter (TA24-6)

Astronomy Plus

Astronomy Plus SCT Male to M42M Adapter SCT Male to M42M Adapter Metallic adapter. Adds 2mm of back Focus Technical Specifications Side A : SCT Ma...

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Original price $11.00 - Original price $11.00
Original price
$11.00
$11.00 - $11.00
Current price $11.00
Original price $84.00 - Original price $84.00
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$84.00
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Current price $84.00

Explore Scientific iEXOS-100 Azimuth Adjuster Adapter (ES100AZADJ-03)

Explore Scientific

Explore Scientific iEXOS-100 Azimuth Adjuster Adapter The Azimuth Adjuster Adapter is designed for use on the Twilight Medium Duty or Twilight Heav...

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Original price $84.00 - Original price $84.00
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$84.00
$84.00 - $84.00
Current price $84.00
Original price $25.00 - Original price $25.00
Original price
$25.00
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Current price $25.00

Baader Hyperion Finetuning-Ring M48, 14 mm (HDFT-14)

Baader Planetarium

Baader Hyperion Finetuning-Ring M48, 14 mm With the addition of Baader's new Finetuning Rings, each Hyperion eyepiece can now function as four eyep...

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Original price $25.00 - Original price $25.00
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$25.00
$25.00 - $25.00
Current price $25.00
Original price $5.00 - Original price $5.00
Original price
$5.00
$5.00 - $5.00
Current price $5.00

Astronomy Plus M48M to M48M Adapter (TA24-5)

Astronomy Plus

Astronomy Plus M48M to M48M Adapter M48M to M48M Metallic adapter. Adds 2mm of back Focus Technical Specifications Side A : M48 x 0.75 Male Side B...

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Original price $5.00 - Original price $5.00
Original price
$5.00
$5.00 - $5.00
Current price $5.00
Original price $70.00 - Original price $70.00
Original price
$70.00
$70.00 - $70.00
Current price $70.00

Starizona Canon RF Wide T-Ring (RF-TRING-10)

Starizona

Starizona Canon RF Wide T-Ring This wide M48-threaded T-ring will fit Canon RF-mount mirrorless cameras.  It is a "T-minus" style ring that is on...

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Original price $70.00 - Original price $70.00
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$70.00
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Current price $70.00
Original price $21.00 - Original price $41.00
Original price
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$21.00 - $41.00
Current price $21.00

Astronomy Plus M65x1 Metal Extension Tube (TA458)

Astronomy Plus

Astronomy Plus M65*1 Metal Extension Tube Elevate your astronomy game with our Astronomy Plus M65x1 Metal Focal Length Extension Tube (TA458). Need...

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Original price $21.00 - Original price $41.00
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Current price $21.00
Original price $21.00 - Original price $43.38
Original price
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$21.00 - $43.38
Current price $21.00

Astronomy Plus M72 Metal Extension Tube (TA456)

Astronomy Plus

Astronomy Plus M72x0.75 Metal Extension Tube Elevate your astronomy game with our Astronomy Plus M72*0.75 Metal Focal Length Extension Tube (TA456)...

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Original price $21.00 - Original price $43.38
Original price
$21.00 - $43.38
$21.00 - $43.38
Current price $21.00
Original price $91.00 - Original price $91.00
Original price
$91.00
$91.00 - $91.00
Current price $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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Original price $91.00 - Original price $91.00
Original price
$91.00
$91.00 - $91.00
Current price $91.00
Original price $39.00 - Original price $39.00
Original price
$39.00
$39.00 - $39.00
Current price $39.00

Pegasus Astro M68 Male to M54 Female

Pegasus

Pegasus Astro M68 Male to M54 Female Adapter (Backfocus) Thickness: 1.4 mm M68 Thread: Pitch 1.0mm / 4mm length M54 Thread Pitch 0.75mm Technical...

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Original price $39.00 - Original price $39.00
Original price
$39.00
$39.00 - $39.00
Current price $39.00
Original price $39.00 - Original price $39.00
Original price
$39.00
$39.00 - $39.00
Current price $39.00

Pegasus Astro M68 Male to M48 Female Adapter

Pegasus

Pegasus Astro M68 Male to M48 Female Adapter Adapter (Backfocus) Thickness: 1.4 mm M68 Thread: Pitch 1.0mm / 4mm length M48 Thread Pitch 0.75mm T...

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Original price $39.00 - Original price $39.00
Original price
$39.00
$39.00 - $39.00
Current price $39.00
Original price $209.00 - Original price $209.00
Original price
$209.00
$209.00 - $209.00
Current price $209.00

Artesky M54 Adapter for Celestron EDGE HD 9.25" 11" and 14" (SCT-EDGE-M54)

Artesky

Artesky M54 Adapter for Celestron EDGE HD 9.25" 11" and 14"  This photographic T-Adapter for telescopes is to be used together with an M54 ring to ...

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Original price $209.00 - Original price $209.00
Original price
$209.00
$209.00 - $209.00
Current price $209.00
Original price $50.00 - Original price $50.00
Original price
$50.00
$50.00 - $50.00
Current price $50.00

Baader Wide-T-Ring D52i for Nikon Z (TRING-NZW)

Baader Planetarium

Baader Wide-T-Ring D52i for Nikon Z, with S52 Adapter Baader Wide-T-Ring Nikon Z to connect Nikon Z cameras on the Astro T-2 system and the S52 do...

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Original price $50.00 - Original price $50.00
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$50.00
$50.00 - $50.00
Current price $50.00
Original price $49.00 - Original price $49.00
Original price
$49.00
$49.00 - $49.00
Current price $49.00

QHYCCD Canon Lens Adapter M42 (020072)

QHYCCD

QHYCCD Canon Lens Adapter M42 10mm M42 Canon Lens Adapter for QHYCCD Cooled CMOS (COLDMOS) imaging cameras.. Technical Specifications  ...

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Original price $49.00 - Original price $49.00
Original price
$49.00
$49.00 - $49.00
Current price $49.00
Original price $15.00 - Original price $15.00
Original price
$15.00
$15.00 - $15.00
Current price $15.00

SVBONY SV125 2'' to T2 SLR Camera Adapter (F9196A)

Svbony

SVBONY SV125 2'' to T2 SLR Camera Adapter  Svbony 2'' to T2 camera adapter fits for all 2'' focusers, at the end of the adapter is threaded to ac...

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Original price $15.00 - Original price $15.00
Original price
$15.00
$15.00 - $15.00
Current price $15.00
Original price $43.00 - Original price $43.00
Original price
$43.00
$43.00 - $43.00
Current price $43.00

Baader 2mm UFC T-2 Extension Camera-Adapter (UFC-T2E)

Baader Planetarium

Baader 2mm UFC T-2 Extension Camera-Adapter  Baader UFC T-2-Thread Adapter telescope-side: with mounting plate for UFC-Base (screws included) c...

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Original price $43.00 - Original price $43.00
Original price
$43.00
$43.00 - $43.00
Current price $43.00
Original price $66.00 - Original price $66.00
Original price
$66.00
$66.00 - $66.00
Current price $66.00

Baader UFC 2" (M48) Filter Slider (UFC-2)

Baader Planetarium

Baader UFC 2" (M48) Filter Slider Baader UFC 2" Filter Slider / Filter Container M48 suitable for cell mounted 2" (M48) filters slides into the UF...

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Original price $66.00 - Original price $66.00
Original price
$66.00
$66.00 - $66.00
Current price $66.00
Original price $85.00 - Original price $85.00
Original price
$85.00
$85.00 - $85.00
Current price $85.00

Baader 13mm UFC Base (Filter Chamber) S70 dovetail receptor (UFC-BASE)

Baader Planetarium

Baader 13mm UFC Base (Filter Chamber) S70 dovetail receptor Baader UFC Base (Filter Chamber) for 2" / 50.4 / 50x50 filter sliders Telescope-side:...

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Original price $85.00 - Original price $85.00
Original price
$85.00
$85.00 - $85.00
Current price $85.00
Original price $30.00 - Original price $30.00
Original price
$30.00
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Current price $30.00

Artesky Vixen Dovetail 5.5cm with 1/4" Screw (ART8209)

Artesky

Artesky Vixen Dovetail 5.5cm with 1/4" Screw  Compact and very useful bar for connecting small accessories or reflex cameras with 1/4" photographic...

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Original price $30.00 - Original price $30.00
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$30.00
$30.00 - $30.00
Current price $30.00
Original price $22.00 - Original price $22.00
Original price
$22.00
$22.00 - $22.00
Current price $22.00

SVBONY 2" T Adapter with Filter Thread (W2760A)

Svbony

SVBONY 2" T Adapter with Filter Thread  2" T to M42*0.75 Adapter Thread for Astronomy Monocular Telescope Mount Adapters Accept 2" Filter and Came...

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Original price $22.00 - Original price $22.00
Original price
$22.00
$22.00 - $22.00
Current price $22.00
Original price $133.00 - Original price $133.00
Original price
$133.00
$133.00 - $133.00
Current price $133.00

PrimaluceLab 2" Visual Back for ESATTO 2" LP (PL8410053)

PrimaluceLab

PrimaluceLab 2" Visual Back for ESATTO 2" LP If you want to connect a camera with a 2" nosepiece to your ESATTO 2” LP, just connect the 2" visual ...

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Original price $133.00 - Original price $133.00
Original price
$133.00
$133.00 - $133.00
Current price $133.00
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