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

Pegasus Astro M68 Male to M63 Female

Pegasus

Pegasus Astro M68 Male to M63 Female Adapter (Backfocus) Thickness: 1.4 mm Thread: Pitch 1.0 mm / 4 mm length Inner hole with M63F / 1.00 mm For ...

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Original price $39.00 - Original price $39.00
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$39.00
$39.00 - $39.00
Current price $39.00
Original price $75.00 - Original price $75.00
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$75.00
$75.00 - $75.00
Current price $75.00

Baader M54 x 0.75 Inverter Ring - M54M to M54F (M54-INVE)

Baader Planetarium

Baader M54 x 0.75 Inverter Ring - M54M to M54F Inverter ring with continuous M54 x 0,75 male thread Converts an M54 x 0.75 female thread into an...

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Original price $75.00 - Original price $75.00
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$75.00
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Current price $75.00
Original price $152.00 - Original price $152.00
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$152.00
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Current price $152.00

Baader 2" Clicklock Clamp for Takahashi Sky90 (external M64 Thread) (CLSKY90-2)

Baader Planetarium

Baader 2" Clicklock Clamp for Takahashi Sky90 (external M64 Thread) The wait is over. Baader Planetarium has developed the big brother to their acc...

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Original price $152.00 - Original price $152.00
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$152.00
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Current price $152.00
Original price $89.00 - Original price $89.00
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$89.00
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Current price $89.00

Astronomy Plus M48 T Adapter for LARGE SCT EDGE HD (9.25/11/14) (TA663)

Astronomy Plus

Astronomy Plus M48 T Adapter for LARGE SCT EDGE HD (9.25/11/14)   This T-Adapter allows you to connect your Celestron C925HD, C11HD, or C14HD teles...

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Original price $89.00 - Original price $89.00
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$89.00
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Current price $89.00
Original price $25.00 - Original price $25.00
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$25.00
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Current price $25.00

ZWO M54M - M54F 7.5mm Adapter (M54-M54-7.5)

ZWO

ZWO M54M - M54F 7.5mm Adapter This adapter allows conversion from male M54 to female M54 with 7.5mm spacing. Technical Specifications M54 Male Thr...

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Original price $25.00 - Original price $25.00
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$25.00
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Original price $86.00 - Original price $86.00
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$86.00
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Current price $86.00

Pegasus Adapter 3.29 inches (For SCTs C11, C14) Female to M68M (ADAPT-SCT3-M68M)

Pegasus

Pegasus Adapter 3.29 inches (For SCTs C11, C14) Female to M68M Adapter 3.29 inches (For SCTs C11, C14) Female to M68M  Technical Specifications ...

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Original price $86.00 - Original price $86.00
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$86.00
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Current price $86.00
Original price $37.00 - Original price $37.00
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$37.00
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Current price $37.00

Baader UFC S70 / 2" SC-thread (int) Telescope-Adapter (UFC-SCI)

Baader Planetarium

Baader UFC S70 / 2" SC-thread (int) Telescope-Adapter Baader UFC S70 / 2" SC-thread (int) Adapter Telescope-side: 2" SC internal thread Camera-sid...

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Original price $37.00 - Original price $37.00
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Original price $11.00 - Original price $11.00
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$11.00
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Current price $11.00

Astronomy Plus M48M to M42F Adapter (TA483)

Astronomy Plus

Astronomy Plus M42F to M48M Adapter M42F to M48M metallic adapter. Adds 0 mm of back Focus Technical Specifications Connection Side A M48 x 0.75...

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Original price $11.00 - Original price $11.00
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$11.00
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Original price $62.00 - Original price $62.00
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$62.00
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Current price $62.00

Baader Flat Base Plate for BDS-NT Diamond Steeltrack (BDS-FLAT)

Baader Planetarium

Baader Flat Base Plate for BDS-NT Diamond Steeltrack Enables mounting of the Baader NT Diamond Steeltrack onto Dobsonians with flat mounting surfac...

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Original price $62.00 - Original price $62.00
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$62.00
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Current price $62.00
Original price $19.00 - Original price $19.00
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$19.00
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Current price $19.00

Astronomy Plus SCT Female to T2 Adapter (TA148)

Astronomy Plus

Astronomy Plus SCT Female to T2 Adapter  SCT Female ring to T2 (M42M) metallic adapter. Adds 55 mm of back spacing Technical Specifications Conn...

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Original price $19.00 - Original price $19.00
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$19.00
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Current price $19.00
Original price $7.00 - Original price $7.00
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$7.00
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Current price $7.00

Astronomy Plus M48F to M48F 6mm Adapter (TA482)

Astronomy Plus

Astronomy Plus M48F to M48F 6mm Adapter M48F to M48F metallic adapter. Adds 6 mm of back Focus Technical Specifications Connection Side A M48 x ...

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Original price $7.00 - Original price $7.00
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$7.00
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Current price $7.00
Original price $133.00 - Original price $133.00
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$133.00
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Current price $133.00

PrimaluceLab Adapter ESATTO 3" for ARCO 3" (PL3600458)

PrimaluceLab

PrimaluceLab Adapter ESATTO 3" for ARCO 3" Adapter ESATTO 3" for ARCO 3" allows you to connect the rotator to ESATTO 3" microfocuser and control it...

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Original price $133.00 - Original price $133.00
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$133.00
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Current price $133.00
Original price $118.00 - Original price $118.00
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$118.00
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Current price $118.00

ADM D Series Male to Male Adapter. 12″ Long (DMM12)

ADM

ADM D Series Male to Male Adapter. 12″ Long Male to male dovetail plate. For use of secondary equipment on equatorial mount and DSBS. 12″ Long, 4″ ...

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Original price $118.00 - Original price $118.00
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$118.00
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Current price $118.00
Original price $190.00 - Original price $190.00
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$190.00
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Current price $190.00

Takahashi 2" Visual Adapter FS-78 (TKA21110)

Takahashi

Takahashi 2" Visual Adapter FS-78 2 Inch Visual Adapter Female M56 to Female 50.8mm Sleeve Metal Back = 39.5mm  Technical Specifications Female ...

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Original price $190.00 - Original price $190.00
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$190.00
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Current price $190.00
Original price $193.00 - Original price $193.00
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$193.00
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Current price $193.00

Pegasus Astro NYX101 Retrofit Kit for Heavier OTAs (NYX101-RETROFIT)

Pegasus

Pegasus Astro NYX101 Retrofit Kit for Heavier OTAs   In the Box Retrofit Kit for Heavier OTAs  

Original price $193.00 - Original price $193.00
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$193.00
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Current price $193.00
Original price $30.00 - Original price $30.00
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$30.00
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Current price $30.00

Baader Hyperion / Morpheus® M43 extension (SPCR-43)

Baader Planetarium

Baader Hyperion / Morpheus® M43 extension   M43/M43 extension (distance ring), suitable for Morpheus, Hyperion and other eyepieces/adapters with M...

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

Pegasus Astro M68 Male to M68 Male (M54 inner hole)

Pegasus

Pegasus Astro M68 Male to M68 Male (M54 inner hole) Adapter (Backfocus) Thickness: 1.4 mm Thread: Pitch 1.0mm / 4 mm length Inner hole with M54 / ...

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

Pegasus Astro M68 Male to M42 Male

Pegasus

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

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Original price $39.00 - Original price $39.00
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$39.00
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Current price $39.00
Original price $135.00 - Original price $135.00
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$135.00
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Current price $135.00

William Optics SCT to 1.25" RotoLock Visual Back Adapter (F-ROTO-A2-125-SCT-TA)

William Optics

William Optics SCT to 1.25" RotoLock Visual Back Adapter The new RotoLock series of adapters from William Optics may well set the "gold' standard ...

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Original price $135.00 - Original price $135.00
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$135.00
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Current price $135.00
Original price $63.00 - Original price $63.00
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$63.00
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Current price $63.00

Baader 2" Safety Kerf nosepiece with 2" filter thread (2408156)

Baader Planetarium

Baader 2" Safety Kerf nosepiece with 2" filter thread Ultra hard 2"nose piece, with Baader proprietory Safety Kerfs (introduced with our Morpheus ...

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Original price $63.00 - Original price $63.00
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$63.00
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Current price $63.00
Original price $17.00 - Original price $17.00
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$17.00
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Current price $17.00

Baader UFC 1.25" AUX-Filter-Holder (UFC-1)

Baader Planetarium

Baader UFC 1.25" AUX-Filter-Holder (requires #2459113) Baader UFC 1¼" AUX-Filter-Holder Accepts mounted 1¼" filters Requires 1x UFC-RD50 Slider...

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Original price $17.00 - Original price $17.00
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$17.00
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Current price $17.00
Original price $37.00 - Original price $37.00
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$37.00
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Current price $37.00

Baader 1mm UFC S70 / T-2 Adapter (UFC-T2I)

Baader Planetarium

Baader 1mm UFC S70 / T-2 Adapter  Baader UFC T-2-Thread Adapter telescope-side: with T-2 internal thread camera-side: with S70 dovetail can be...

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Original price $37.00 - Original price $37.00
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$37.00
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Current price $37.00
Original price $152.00 - Original price $152.00
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$152.00
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Current price $152.00

Baader UFC S70 VariLock 15-20mm extension (UFC-XV)

Baader Planetarium

Baader UFC S70 VariLock 15-20mm extension Baader UFC S70/5 VariLock Extension 15-20mm Continuosly (stepless) adjustable UFC extension with millime...

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Original price $152.00 - Original price $152.00
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$152.00
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Current price $152.00
Original price $43.00 - Original price $43.00
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$43.00
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Current price $43.00

Baader UFC S70 Extension 5mm (UFC-XT5)

Baader Planetarium

Baader UFC S70 Extension 5mm Baader UFC S70/5 Extension 5mm Telescope-side: with S70 dovetail clamp (screws included) Camera-side: with S70 doveta...

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Original price $43.00 - Original price $43.00
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$43.00
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Current price $43.00
Original price $49.00 - Original price $49.00
Original price
$49.00
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Current price $49.00

Baader UFC S70/15 Extension 15mm (UFC-XT15)

Baader Planetarium

Baader UFC S70/15 Extension 15mm  Baader UFC S70/5 Extension 15mm Telescope-side: with S70 dovetail clamp (screws included) Camera-side: with S70 ...

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Original price $49.00 - Original price $49.00
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$49.00
$49.00 - $49.00
Current price $49.00
Original price $241.00 - Original price $241.00
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$241.00
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Current price $241.00

Baader 3mm UFC S70 11" RASA Telescope-Adapter (UFC-RASA11)

Baader Planetarium

Baader 3mm UFC S70 11" RASA Telescope-Adapter Baader UFC S70 / 11" RASA Adapter Telescope-side: RASA 11"-plate Camera-side: S70 dovetail Can be a...

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Original price $241.00 - Original price $241.00
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$241.00
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Current price $241.00
Original price $111.00 - Original price $111.00
Original price
$111.00
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Current price $111.00

PrimaLuceLab Guide Scope Support for ECCO (ECCOSUP)

PrimaluceLab

PrimaLuceLab Guide Scope Support for ECCO ECCO is completely metal built and, for this reason, it can also be used as a finder support by adding th...

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Original price $111.00 - Original price $111.00
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$111.00
$111.00 - $111.00
Current price $111.00
Original price $100.00 - Original price $100.00
Original price
$100.00
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Current price $100.00

Artesky 360° Rotating T2 Adapter (ART8268V2)

Artesky

Artesky 360° Rotating T2 Adapter Thanks to the T2 360° rotator you can rotate your camera or your accessories 360° on its axis in order to straight...

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Original price $100.00 - Original price $100.00
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$100.00
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Current price $100.00
Original price $145.00 - Original price $145.00
Original price
$145.00
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Current price $145.00

Artesky Twist Lock 2" Eyepiece Holder (ART-TLNEWSW)

Artesky

Artesky Twist Lock 2" Eyepiece Holder for Newton Skywatcher Artesky is pleased to present the 2" (50.8mm) Twist Lock eyepiece holder for Skywatcher...

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Original price $145.00 - Original price $145.00
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$145.00
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Current price $145.00
Original price $40.00 - Original price $40.00
Original price
$40.00
$40.00 - $40.00
Current price $40.00

QHYCCD CGEM, Sky Watcher & Orion Polemaster Adapter (020022)

Astronomy Plus

QHYCCD Sky Watcher and Orion Polemaster Adapter The PoleMaster™ is a high precision and simple to utilize electronic polarscope. The PoleMaster is ...

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Original price $40.00 - Original price $40.00
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$40.00
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Current price $40.00
Original price $44.00 - Original price $44.00
Original price
$44.00
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Current price $44.00

SVBONY SV112 1.25" Eyepiece Projection Kit (F9183A)

Svbony

SVBONY SV112 1.25" Eyepiece Projection Kit  Svbony SV112 includes the parts you will need for both "prime focus" and variable "eyepiece projection...

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Original price $44.00 - Original price $44.00
Original price
$44.00
$44.00 - $44.00
Current price $44.00
Original price $26.00 - Original price $29.00
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$26.00 - $29.00
Current price $26.00

SVBONY DSLR to 1.25" Eyepiece Adapter

Svbony

SVBONY DSLR to 1.25" Eyepiece Adapter  The SVBONY SV149 DSLR camera lens to 1.25-inch eyepiece adapter is designed for digital Nikon AF lens (W9112...

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Original price $26.00 - Original price $29.00
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$26.00 - $29.00
Current price $26.00
Original price $22.00 - Original price $22.00
Original price
$22.00
$22.00 - $22.00
Current price $22.00

SVBONY 1.25" Eyepiece Adapter with Coaxial Lock (F9164A)

Svbony

SVBONY 1.25" Eyepiece Adapter with Coaxial Lock  Convenient hybrid adapter lets you use older style M42 format eyepieces in modern telescopes that...

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Original price $22.00 - Original price $22.00
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$22.00
$22.00 - $22.00
Current price $22.00
Original price $273.00 - Original price $273.00
Original price
$273.00
$273.00 - $273.00
Current price $273.00

PrimaluceLab Adapter ESATTO 3,5” LP for OfficinaStellare Veloce RH200 (PL3600365)

PrimaluceLab

PrimaluceLab Adapter ESATTO 3,5” LP for OfficinaStellare Veloce RH200 Since RH200 optimal backfocus is 105mm from the rear tip-tilt plate, by...

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Original price $273.00 - Original price $273.00
Original price
$273.00
$273.00 - $273.00
Current price $273.00
Original price $175.00 - Original price $175.00
Original price
$175.00
$175.00 - $175.00
Current price $175.00

PrimaluceLab Adapter from M98 to M68 with stop ring for ESATTO 3,5” LP (PL3600363)

PrimaluceLab

PrimaluceLab Adapter from M98 to M68 with stop ring for ESATTO 3,5” LP Adapter from M98 to M68 with stop ring for ESATTO 3,5" LP allows you to con...

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Original price $175.00 - Original price $175.00
Original price
$175.00
$175.00 - $175.00
Current price $175.00
Original price $105.00 - Original price $105.00
Original price
$105.00
$105.00 - $105.00
Current price $105.00

William Optics M63 to M48 Photo Adapter (P-PAM63-48)

William Optics

William Optics M63 to M48 Photo Adapter    Technical Specifications Weight:185g In the Box William Optics M63 to M48 Photo adapter Warranty &...

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Original price $105.00 - Original price $105.00
Original price
$105.00
$105.00 - $105.00
Current price $105.00
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