Skip to content
Enjoy Free Shipping on Orders Over $500 + Same-Day Dispatch (Before 3 PM*) *Some exclusions apply
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 $25.00 - Original price $25.00
Original price
$25.00
$25.00 - $25.00
Current price $25.00

Baader Adjustable pin type face wrench ø 2mm (2450062)

Baader Planetarium

Baader Adjustable pin type face wrench ø 2mm Optional tool for unmounting the M48 / T-2 insert-ring from the Baader Protective CANON T-Ring Also f...

View full details
Original price $25.00 - Original price $25.00
Original price
$25.00
$25.00 - $25.00
Current price $25.00
Original price $37.00 - Original price $37.00
Original price
$37.00
$37.00 - $37.00
Current price $37.00

Baader M48 Metal Dustcap with M48 inner thread (M48-CAP)

Baader Planetarium

Baader M48 Metal Dustcap with M48 inner thread Dustcap with M48 female (inner) thread Robust cap made of black anodized metal Dustproof closure for...

View full details
Original price $37.00 - Original price $37.00
Original price
$37.00
$37.00 - $37.00
Current price $37.00
Original price $37.00 - Original price $37.00
Original price
$37.00
$37.00 - $37.00
Current price $37.00

Baader M48 Metal Dustcap with M48 outer thread (M48-PLUG)

Baader Planetarium

Baader M48 Metal Dustcap with M48 outer thread Dustcap with M48 male (outer) thread Robust cap made of black anodized metal Dustproof closure for y...

View full details
Original price $37.00 - Original price $37.00
Original price
$37.00
$37.00 - $37.00
Current price $37.00
Original price $37.00 - Original price $37.00
Original price
$37.00
$37.00 - $37.00
Current price $37.00

Baader M48 Metal Dustcap with Dovetail (M48-DOVE)

Baader Planetarium

Baader M48 Metal Dustcap with Dovetail  M48 dustcap with dovetail Robust cap made of black anodized metal Dustproof closure for the Baader Heavy Du...

View full details
Original price $37.00 - Original price $37.00
Original price
$37.00
$37.00 - $37.00
Current price $37.00
Original price $44.00 - Original price $44.00
Original price
$44.00
$44.00 - $44.00
Current price $44.00

Baader Metal Dustcap with M54 internal thread (M54-CAP)

Baader Planetarium

Baader Metal Dustcap with M54 internal thread Dustcap with M54 female thread Robust cap made of black anodized metal Dustproof closure for your ac...

View full details
Original price $44.00 - Original price $44.00
Original price
$44.00
$44.00 - $44.00
Current price $44.00
Original price $44.00 - Original price $44.00
Original price
$44.00
$44.00 - $44.00
Current price $44.00

Baader Metal Dustcap with M54 external thread (M54-PLUG)

Baader Planetarium

Baader Metal Dustcap with M54 external thread Dustcap with M54 male thread Robust cap made of black anodized metal Dustproof closure for your acces...

View full details
Original price $44.00 - Original price $44.00
Original price
$44.00
$44.00 - $44.00
Current price $44.00
Original price $44.00 - Original price $44.00
Original price
$44.00
$44.00 - $44.00
Current price $44.00

Baader M54 Metal Dustcap with S54a dovetail (M54-DOVE)

Baader Planetarium

Baader M54 Metal Dustcap with S54a dovetail (M54-DOVE) M54 dustcap with S54a ring dovetail Robust cap made of black anodized metal Dustproof closu...

View full details
Original price $44.00 - Original price $44.00
Original price
$44.00
$44.00 - $44.00
Current price $44.00
Original price $53.00 - Original price $53.00
Original price
$53.00
$53.00 - $53.00
Current price $53.00

Baader Adapter M54 external to M48 internal (M54E/M48F)

Baader Planetarium

Baader Adapter M54 external to M48 internal (M54E/M48F) Reducing Adapter M54 to M48 with M54 male thread Changes the M54 female thread of an adapt...

View full details
Original price $53.00 - Original price $53.00
Original price
$53.00
$53.00 - $53.00
Current price $53.00
Original price $56.00 - Original price $56.00
Original price
$56.00
$56.00 - $56.00
Current price $56.00

Baader 2" Nosepiece to M54 external with Safety-Kerf (M54-NOSE)

Baader Planetarium

Baader 2" Nosepiece to M54 external with Safety-Kerf Nosepiece 2" to M54a, ultra-hard with Safety-Kerfs Focus-sided M54 male thread Telescope-side...

View full details
Original price $56.00 - Original price $56.00
Original price
$56.00
$56.00 - $56.00
Current price $56.00
Original price $130.00
Original price $130.00 - Original price $130.00
Original price $130.00
Current price $70.00
$70.00 - $70.00
Current price $70.00

William Optics Super high precision COPPER T-mount for Nikon full frame (YE-TR-BR48-N)

William Optics

Super high precision COPPER T-mount for Nikon full frame  T-mount for Nikon full-frame camera copper version. Made from high quality copper materia...

View full details
Original price $130.00
Original price $130.00 - Original price $130.00
Original price $130.00
Current price $70.00
$70.00 - $70.00
Current price $70.00
Save $60.00 Save $0.00
Original price $41.00 - Original price $41.00
Original price
$41.00
$41.00 - $41.00
Current price $41.00

PrimaLuceLab 9mm M48 Extension (PL3304809)

PrimaluceLab

PrimaLuceLab 9mm M48 Extension PrimaLuceLab M48 extensions are available in different lengths and they present on both sides of a M48 thread (...

View full details
Original price $41.00 - Original price $41.00
Original price
$41.00
$41.00 - $41.00
Current price $41.00
Original price $10.00 - Original price $10.00
Original price
$10.00
$10.00 - $10.00
Current price $10.00

Orion Variable 12-17mm T-thread Spacer Ring (05326)

Orion

Orion Variable 12-17mm T-thread Spacer Ring  In the Box Orion Variable 12-17mm T-thread Spacer Ring Manuals & Warranty Orion 1-year warranty ...

View full details
Original price $10.00 - Original price $10.00
Original price
$10.00
$10.00 - $10.00
Current price $10.00
Sold out
Original price $28.00 - Original price $28.00
Original price
$28.00
$28.00 - $28.00
Current price $28.00

Baader Hyperion DT-Ring SP54/M52 (HDT54/52)

Baader Planetarium

Baader Hyperion DT-Ring SP54/M52 Adapts camera lenses onto Hyperion and Morpheus Eyepieces, as well as DT Adapter II & III, for afocal eyepiec...

View full details
Original price $28.00 - Original price $28.00
Original price
$28.00
$28.00 - $28.00
Current price $28.00
Original price $28.00 - Original price $28.00
Original price
$28.00
$28.00 - $28.00
Current price $28.00

Baader Hyperion DT-Ring SP54/M58 (HDT54/58)

Baader Planetarium

Baader Hyperion DT-Ring SP54/M58 Adapts camera lenses onto Hyperion and Morpheus Eyepieces, as well as DT Adapter II & III, for afocal eyepiec...

View full details
Original price $28.00 - Original price $28.00
Original price
$28.00
$28.00 - $28.00
Current price $28.00
Original price $119.00 - Original price $119.00
Original price
$119.00
$119.00 - $119.00
Current price $119.00

Lunt Clamshell Mounting Ring for LS60THa or LS80THa (CLAM)

Lunt

Lunt Clamshell Mounting Ring for LS60THa or LS80THa The black-anodized heavy-duty Lunt Clamshell Mounting Ring for LS60THa or LS80THa mounting ring...

View full details
Original price $119.00 - Original price $119.00
Original price
$119.00
$119.00 - $119.00
Current price $119.00
Original price $247.00 - Original price $247.00
Original price
$247.00
$247.00 - $247.00
Current price $247.00

PlaneWave 2″-24 TPI Male to SecureFit (200395-2)

Planewave

PlaneWave 2″-24 TPI Male to SecureFit This 0.25″ long adapter presents 2″-24 TPI male thread on the camera facing side and PlaneWave SecureFit bolt...

View full details
Original price $247.00 - Original price $247.00
Original price
$247.00
$247.00 - $247.00
Current price $247.00
Original price $247.00 - Original price $247.00
Original price
$247.00
$247.00 - $247.00
Current price $247.00

PlaneWave SBIG STL to SecureFit (200362)

Planewave

PlaneWave SBIG STL to SecureFit - CCD Adapter, SBIG STL to PlaneWave SecureFit An adapter that is used in conjunction with Secure Fit CCD Spacer to...

View full details
Original price $247.00 - Original price $247.00
Original price
$247.00
$247.00 - $247.00
Current price $247.00
Original price $281.00 - Original price $281.00
Original price
$281.00
$281.00 - $281.00
Current price $281.00

PlaneWave SecureFit to M42 Male T-Thread (200393)

Planewave

PlaneWave SecureFit to M42 Male T-Thread CCD Adapter, Male T-Thread to PlaneWave SecureFit: An adapter that is used in conjunction with SecureFit C...

View full details
Original price $281.00 - Original price $281.00
Original price
$281.00
$281.00 - $281.00
Current price $281.00
Original price $314.00 - Original price $314.00
Original price
$314.00
$314.00 - $314.00
Current price $314.00

PlaneWave Apogee to SecureFit (200396)

Planewave

PlaneWave Apogee to SecureFit CCD Adapter, Apogee to PlaneWave SecureFit: An adapter that is used in conjunction with Secure Fit CCD Spacer to atta...

View full details
Original price $314.00 - Original price $314.00
Original price
$314.00
$314.00 - $314.00
Current price $314.00
Original price $314.00 - Original price $314.00
Original price
$314.00
$314.00 - $314.00
Current price $314.00

PlaneWave CDK20 To AP Female (600332)

Planewave

PlaneWave CDK20 To AP Female This adapter mounts in place of a focuser on CDK14/17/20 & 24 models and has the standard AP female threads. In t...

View full details
Original price $314.00 - Original price $314.00
Original price
$314.00
$314.00 - $314.00
Current price $314.00
Original price $216.00 - Original price $216.00
Original price
$216.00
$216.00 - $216.00
Current price $216.00

PlaneWave CDK17/20 to Clement Focuser (200379)

Planewave

PlaneWave CDK17/20 to Clement Focuser This adapter attaches to the back of the CDK17 or CDK20 using the same retaining ring that holds the PlaneWav...

View full details
Original price $216.00 - Original price $216.00
Original price
$216.00
$216.00 - $216.00
Current price $216.00
Original price $140.00 - Original price $140.00
Original price
$140.00
$140.00 - $140.00
Current price $140.00

Takahashi Prime focus ring 89 mm (TKA86002)

Takahashi

Takahashi Prime focus ring 89 mm In the Box Takahashi Prime focus ring 89 mm Manual & Warranty Takahashi 5-Years Warranty

Original price $140.00 - Original price $140.00
Original price
$140.00
$140.00 - $140.00
Current price $140.00
Original price $60.00 - Original price $60.00
Original price
$60.00
$60.00 - $60.00
Current price $60.00

Takahashi CCA-250 Visual adapter (TKA86005)

Takahashi

Takahashi CCA-250 Visual adapter In the Box Takahashi CCA-250 Visual adapter Manual & Warranty Takahashi 5-Years Warranty

Original price $60.00 - Original price $60.00
Original price
$60.00
$60.00 - $60.00
Current price $60.00
Original price $280.00 - Original price $280.00
Original price
$280.00
$280.00 - $280.00
Current price $280.00

PlaneWave SecureFit to M68 x 1 (600390)

Planewave

PlaneWave SecureFit to M68 x 1 This adapter presents M68 x 1 male threads on the camera side and presents SecureFit on the telescope side. Bac...

View full details
Original price $280.00 - Original price $280.00
Original price
$280.00
$280.00 - $280.00
Current price $280.00
Original price $281.00 - Original price $281.00
Original price
$281.00
$281.00 - $281.00
Current price $281.00

PlaneWave SecureFit to M62 x 0.75 (600387)

Planewave

PlaneWave SecureFit to M62 x 0.75 This adapter presents M62 x 0.75 male threads on the camera side and presents SecureFit on the telescope sid...

View full details
Original price $281.00 - Original price $281.00
Original price
$281.00
$281.00 - $281.00
Current price $281.00
Original price $281.00 - Original price $281.00
Original price
$281.00
$281.00 - $281.00
Current price $281.00

PlaneWave SecureFit to M54 x 0.75 (600389)

Planewave

PlaneWave SecureFit to M54 x 0.75 This adapter presents M54 x 0.75 male threads on the camera side and presents SecureFit on the telescope sid...

View full details
Original price $281.00 - Original price $281.00
Original price
$281.00
$281.00 - $281.00
Current price $281.00
Original price $281.00 - Original price $281.00
Original price
$281.00
$281.00 - $281.00
Current price $281.00

PlaneWave SecureFit to M48 x 0.75 (600388)

Planewave

PlaneWave SecureFit to M48 x 0.75 This adapter presents M48 x 0.75 male threads on the camera side and presents SecureFit on the telescope side. B...

View full details
Original price $281.00 - Original price $281.00
Original price
$281.00
$281.00 - $281.00
Current price $281.00
Original price $176.00 - Original price $276.00
Original price
$176.00 - $276.00
$176.00 - $276.00
Current price $176.00

PlaneWave SecureFit Low Profile Spacer

Planewave

PlaneWave SecureFit Low Profile Spacer The 600327/600328 are stacked together and occupy a total 0.50 inch of backfocus. Each sold separately. ...

View full details
Original price $176.00 - Original price $276.00
Original price
$176.00 - $276.00
$176.00 - $276.00
Current price $176.00
Original price $266.00 - Original price $266.00
Original price
$266.00
$266.00 - $266.00
Current price $266.00

PlaneWave 3.5″ Hedrick Focuser to 2.7″ AP Threads (200391)

Planewave

PlaneWave 3.5″ Hedrick Focuser to 2.7″ AP Threads (only for CDK17 and CDK20) This adapter bolts onto the back of the Hedrick 3.5″ Focuser and provi...

View full details
Original price $266.00 - Original price $266.00
Original price
$266.00
$266.00 - $266.00
Current price $266.00
Original price $247.00 - Original price $247.00
Original price
$247.00
$247.00 - $247.00
Current price $247.00

PlaneWave 2.75″ Hedrick Focuser to 2.7″ AP Threads (125370)

Planewave

PlaneWave 2.75″ Hedrick Focuser to 2.7″ AP Threads Adapter, 2.75″ Hedrick Focuser to 2.7″ AP Threads (only for CDK12.5): This adapter bolts onto th...

View full details
Original price $247.00 - Original price $247.00
Original price
$247.00
$247.00 - $247.00
Current price $247.00
Original price $241.00 - Original price $241.00
Original price
$241.00
$241.00 - $241.00
Current price $241.00

Takahashi STL Thread Adapter for QSI WSG Cameras (TCD0774)

Takahashi

Takahashi STL Thread Adapter for QSI WSG Cameras The Takahashi QSI WSG CCD adapter connects the QSI WSG series camera spacer to the STL thread...

View full details
Original price $241.00 - Original price $241.00
Original price
$241.00
$241.00 - $241.00
Current price $241.00
Original price $258.00 - Original price $258.00
Original price
$258.00
$258.00 - $258.00
Current price $258.00

Takahashi 38.5mm T-Thread Spacer for S-Exp. and SBIG Cameras (TCD0385)

Takahashi

Takahashi 38.5mm T-Thread Spacer for S-Exp. and SBIG Cameras  Takahashi T-Thread Spacer adapter of 38.5 mm fortarlight Express and SBIG Camera...

View full details
Original price $258.00 - Original price $258.00
Original price
$258.00
$258.00 - $258.00
Current price $258.00
Original price $258.00 - Original price $258.00
Original price
$258.00
$258.00 - $258.00
Current price $258.00

Takahashi 35.0mm T-Thread Spacer for QHY 8/10/12 Cameras (TCD0350)

Takahashi

Takahashi 35.0mm T-Thread Spacer for QHY 8/10/12 Cameras  Takahashi T-Thread Spacer adapter of 35.0 mm for QHY 8, QHY 10 & QHY 12 Camera  ...

View full details
Original price $258.00 - Original price $258.00
Original price
$258.00
$258.00 - $258.00
Current price $258.00
Original price $216.00 - Original price $216.00
Original price
$216.00
$216.00 - $216.00
Current price $216.00

Takahashi 32.7mm Adapter for SBIG ST/ST-2000 Cameras (TCD0327)

Takahashi

Takahashi 32.7mm Adapter for SBIG ST/ST-2000 Cameras This is a 32.7mm Takahashi adapter for SBIG ST-2000 or ST Series cameras Camera. In the B...

View full details
Original price $216.00 - Original price $216.00
Original price
$216.00
$216.00 - $216.00
Current price $216.00
Original price $218.00 - Original price $218.00
Original price
$218.00
$218.00 - $218.00
Current price $218.00

Takahashi QSI-500 WS/WSI Camera Adapter (TCD0204)

Takahashi

Takahashi QSI-500 WS/WSI Camera Adapter Takahashi adapter for QSI's WS/WSI Camera. In the Box Takahashi QSI-500 WS/WSI Camera Adapter (Pictur...

View full details
Original price $218.00 - Original price $218.00
Original price
$218.00
$218.00 - $218.00
Current price $218.00
Original price $151.00 - Original price $151.00
Original price
$151.00
$151.00 - $151.00
Current price $151.00

Takahashi 18mm T to T Spacer (TCD0180)

Takahashi

Takahashi 18mm T to T Spacer This is a Takahashi 18mm Wide T-Thread to T-Thread Spacer. In the Box Takahashi 18mm T to T Spacer (Picture show...

View full details
Original price $151.00 - Original price $151.00
Original price
$151.00
$151.00 - $151.00
Current price $151.00
Sign Up to Astronomy Plus Newsletters

Subscribe to our Newsletter to be the first to be inform about Promotions, New Products and More!

Free Shipping

in Canada over 500$+* bf txs

Buy Now, Pay Later

Paybright and Sezzle at Check Out

Target the Right Equipment

Contact us!

Price Match

Find a Better Price? We Will Match it!

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare