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Anneaux

Tube rings do more than hold a telescope. They set how securely it is clamped, whether it can be rotated for framing without dismantling anything, and where accessories can be mounted close to the optical axis instead of hanging off a bracket. David Astro carries tube rings in Canada across a wide range of inner diameters, shipping from Canadian stock.

Sizing depends on measured outer tube diameter, which is rarely the same as the telescope's aperture. Tell us the exact model and we will confirm the ring size.

Filtres

$145.20 - $145.20
$145.20
$145.20 - $145.20
$145.20

Farpoint Série D - Anneaux pour Barre à queue d'aronde - 125 mm

FAP-FDR125
2 restant!

Fixez en toute sécurité les accessoires optiques du télescope avec les anneaux en queue d'aronde de style D Farpoint de 125 mm. Comprend deux bag...

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$145.20 - $145.20
$145.20
$145.20 - $145.20
$145.20
$133.10 - $133.10
$133.10
$133.10 - $133.10
$133.10

Farpoint Série D - Anneaux pour Barre à queue d'aronde - 90 mm

FAP-FDR90
1 restant!

Fixez en toute sécurité les accessoires optiques du télescope avec les anneaux en queue d'aronde de style D Farpoint de 90 mm. Comprend deux anne...

Afficher tous les détails
$133.10 - $133.10
$133.10
$133.10 - $133.10
$133.10
$85.00 - $85.00
$85.00
$85.00 - $85.00
$85.00

Lunt Anneaux de Montage - LS60THA ou LS80THA

LSS-CLAM

Coque standard pour le télescope solaire Lunt LS60THa ou LS80THa. Noir anodisé avec fente pour accepter le Tele Vue Sol-Searcher Sun Finder (ve...

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$85.00 - $85.00
$85.00
$85.00 - $85.00
$85.00
Orion Optics UK 150mm Trunion rings and blocks to fit OOUK 6" telescopes
$114.48 - $114.48
$114.48
$114.48 - $114.48
$114.48

Orion Optics UK 150mm Trunion rings and blocks to fit OOUK 6" telescopes

OOUK-150MM-TRUNION-RINGS-BLOCKS-OOUK

Sized for 150mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty Trunion Rings and Blocks -- OOUK 6...

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$114.48 - $114.48
$114.48
$114.48 - $114.48
$114.48
Orion Optics UK 150mm Trunion rings, spacers and blocks for 3rd party telescopes.
$148.73 - $148.73
$148.73
$148.73 - $148.73
$148.73

Orion Optics UK 150mm Trunion rings, spacers and blocks for 3rd party telescopes.

OOUK-150MM-TRUNION-RINGS-SPACERS-BLOCKS

Sized for 150mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty 150mm Trunion Rings, Spacers and B...

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$148.73 - $148.73
$148.73
$148.73 - $148.73
$148.73
Orion Optics UK 200mm Trunion rings and blocks to fit OOUK 8" telescopes
$117.44 - $117.44
$117.44
$117.44 - $117.44
$117.44

Orion Optics UK 200mm Trunion rings and blocks to fit OOUK 8" telescopes

OOUK-200MM-TRUNION-RINGS-BLOCKS-OOUK

Sized for 200mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty Trunion Rings and Blocks -- OOUK 8...

Afficher tous les détails
$117.44 - $117.44
$117.44
$117.44 - $117.44
$117.44
Orion Optics UK 200mm Trunion rings, spacers and blocks for 3rd party telescopes.
$151.73 - $151.73
$151.73
$151.73 - $151.73
$151.73

Orion Optics UK 200mm Trunion rings, spacers and blocks for 3rd party telescopes.

OOUK-200MM-TRUNION-RINGS-SPACERS-BLOCKS

Sized for 200mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty 200mm Trunion Rings, Spacers and B...

Afficher tous les détails
$151.73 - $151.73
$151.73
$151.73 - $151.73
$151.73
Orion Optics UK 250mm Trunion rings and blocks to fit OOUK 10" telescopes
$126.31 - $126.31
$126.31
$126.31 - $126.31
$126.31

Orion Optics UK 250mm Trunion rings and blocks to fit OOUK 10" telescopes

OOUK-250MM-TRUNION-RINGS-BLOCKS-OOUK

Sized for 250mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty Trunion Rings and Blocks -- OOUK 1...

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$126.31 - $126.31
$126.31
$126.31 - $126.31
$126.31
Orion Optics UK 250mm Trunion rings, spacers and blocks for 3rd party telescopes.
$160.56 - $160.56
$160.56
$160.56 - $160.56
$160.56

Orion Optics UK 250mm Trunion rings, spacers and blocks for 3rd party telescopes.

OOUK-250MM-TRUNION-RINGS-SPACERS-BLOCKS

Sized for 250mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty 250mm Trunion Rings, Spacers and B...

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$160.56 - $160.56
$160.56
$160.56 - $160.56
$160.56
Orion Optics UK 300mm Trunion rings and blocks to fit OOUK 12" telescopes
$147.03 - $147.03
$147.03
$147.03 - $147.03
$147.03

Orion Optics UK 300mm Trunion rings and blocks to fit OOUK 12" telescopes

OOUK-300MM-TRUNION-RINGS-BLOCKS-OOUK

Sized for 300mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty Trunion Rings and Blocks -- OOUK 1...

Afficher tous les détails
$147.03 - $147.03
$147.03
$147.03 - $147.03
$147.03
Orion Optics UK 300mm Trunion rings, spacers and blocks for 3rd party telescopes.
$181.28 - $181.28
$181.28
$181.28 - $181.28
$181.28

Orion Optics UK 300mm Trunion rings, spacers and blocks for 3rd party telescopes.

OOUK-300MM-TRUNION-RINGS-SPACERS-BLOCKS

Sized for 300mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty 300mm Trunion Rings, Spacers and B...

Afficher tous les détails
$181.28 - $181.28
$181.28
$181.28 - $181.28
$181.28
Orion Optics UK 350mm Trunion rings and blocks to fit OOUK 14" telescopes
$153.18 - $153.18
$153.18
$153.18 - $153.18
$153.18

Orion Optics UK 350mm Trunion rings and blocks to fit OOUK 14" telescopes

OOUK-350MM-TRUNION-RINGS-BLOCKS-OOUK

Sized for 350mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty Trunion Rings and Blocks -- OOUK 1...

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$153.18 - $153.18
$153.18
$153.18 - $153.18
$153.18
Orion Optics UK 350mm Trunion rings, spacers and blocks for 3rd party telescopes.
$214.83 - $214.83
$214.83
$214.83 - $214.83
$214.83

Orion Optics UK 350mm Trunion rings, spacers and blocks for 3rd party telescopes.

OOUK-350MM-TRUNION-RINGS-SPACERS-BLOCKS

Sized for 350mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty 350mm Trunion Rings, Spacers and B...

Afficher tous les détails
$214.83 - $214.83
$214.83
$214.83 - $214.83
$214.83
Orion Optics UK 400mm Trunion rings and blocks to fit OOUK 16" telescopes
$181.95 - $181.95
$181.95
$181.95 - $181.95
$181.95

Orion Optics UK 400mm Trunion rings and blocks to fit OOUK 16" telescopes

OOUK-400MM-TRUNION-RINGS-BLOCKS-OOUK

Sized for 400mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty Trunion Rings and Blocks -- OOUK 1...

Afficher tous les détails
$181.95 - $181.95
$181.95
$181.95 - $181.95
$181.95
Orion Optics UK 400mm Trunion rings, spacers and blocks for 3rd party telescopes.
$243.60 - $243.60
$243.60
$243.60 - $243.60
$243.60

Orion Optics UK 400mm Trunion rings, spacers and blocks for 3rd party telescopes.

OOUK-400MM-TRUNION-RINGS-SPACERS-BLOCKS

Sized for 400mm Dobsonian mounts CNC machined in the UK Description Specifications In the Box Warranty 400mm Trunion Rings, Spacers and B...

Afficher tous les détails
$243.60 - $243.60
$243.60
$243.60 - $243.60
$243.60
$225.00 - $225.00
$225.00
$225.00 - $225.00
$225.00

Anneaux de support PrimaLuceLab 100 mm PLUS

PLL-PLLANSU100P

Les anneaux de support 100 mm PLUS sont conçus pour être utilisés avec des télescopes réfracteurs à tubes de 100 mm comme Skywatcher ED80 et ED1...

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$225.00 - $225.00
$225.00
$225.00 - $225.00
$225.00
$235.00 - $235.00
$235.00
$235.00 - $235.00
$235.00

Anneaux de support PrimaLuceLab 105 mm PLUS

PLL-PLLANSU105P

Les anneaux de support 105 mm PLUS sont conçus pour tout télescope apochromatique doté d'une plaque pour la connexion de trépieds photographique...

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$235.00 - $235.00
$235.00
$235.00 - $235.00
$235.00
$245.00 - $245.00
$245.00
$245.00 - $245.00
$245.00

Anneaux de support PrimaLuceLab 115 mm PLUS

PLL-PLLANSU115P

Les anneaux de support PLUS de 115 mm peuvent être utilisés avec des télescopes de différentes marques (tels que des réfracteurs de diamètre 120-...

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$245.00 - $245.00
$245.00
$245.00 - $245.00
$245.00
$255.00 - $255.00
$255.00
$255.00 - $255.00
$255.00

Anneaux de support PrimaLuceLab 125 mm PLUS

PLL-PLLANSU125P

Les anneaux de support 125 mm PLUS peuvent être utilisés avec des télescopes de différentes marques (tels que des réfracteurs de diamètre 120-130...

Afficher tous les détails
$255.00 - $255.00
$255.00
$255.00 - $255.00
$255.00
$285.00 - $285.00
$285.00
$285.00 - $285.00
$285.00

Anneaux de support PrimaLuceLab 131 mm PLUS

PLL-PLLANSU131P

Les anneaux de support PLUS de 131 mm peuvent être utilisés avec des télescopes de différentes marques (tels que des réfracteurs de 100 à 130 mm ...

Afficher tous les détails
$285.00 - $285.00
$285.00
$285.00 - $285.00
$285.00
$295.00 - $295.00
$295.00
$295.00 - $295.00
$295.00

Anneaux de support PrimaLuceLab 134 mm PLUS

PLL-PLLANSU134P

Les anneaux de support 134 mm PLUS sont conçus pour les télescopes avec tube optique de 134 mm de diamètre. Compatible avec les télescopes de di...

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$295.00 - $295.00
$295.00
$295.00 - $295.00
$295.00
$305.00 - $305.00
$305.00
$305.00 - $305.00
$305.00

Anneaux de support PrimaLuceLab 140 mm PLUS

PLL-PLLANSU140P

Les anneaux de support 140 mm PLUS sont conçus pour les télescopes avec tube optique de 140 mm de diamètre. Les anneaux de support PLUS d...

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$305.00 - $305.00
$305.00
$305.00 - $305.00
$305.00
$315.00 - $315.00
$315.00
$315.00 - $315.00
$315.00

Anneaux de support PrimaLuceLab 145 mm PLUS

PLL-PLLANSU145P

Les anneaux de support 145 mm PLUS sont conçus pour les télescopes avec un tube optique de 145 mm de diamètre. Les anneaux de support PLU...

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$315.00 - $315.00
$315.00
$315.00 - $315.00
$315.00
$325.00 - $325.00
$325.00
$325.00 - $325.00
$325.00

Anneaux de support PrimaLuceLab 150 mm PLUS

PLL-PLLANSU150P

Les anneaux de support 150 mm PLUS peuvent être utilisés avec tous les télescopes avec un tube de 150 mm de diamètre pour élargir les possibilité...

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$325.00 - $325.00
$325.00
$325.00 - $325.00
$325.00

Sizing and Choosing Tube Rings

Rings are specified by inner diameter and should match the tube closely. Too large and the felt compresses unevenly; too small and they will not close.

  • Inner diameter, not aperture: An 80 mm refractor typically has a tube diameter around 90 mm, and dew shields are wider still. Measure the tube where the rings will sit.
  • Hinged versus split rings: Hinged rings allow a tube to be dropped in without removing the top half, which is considerably easier in the dark with cold hands.
  • Felt and liner material: A proper liner distributes clamping force and protects paint; a hard ring on a bare tube can dent thin aluminium.
  • Top accessory holes: Rings with threaded top holes accept a short rail for a guide scope or finder, keeping accessories close to the optical axis and reducing flexure.
  • Rotation for framing: Loosening rings to rotate the tube changes camera angle without breaking the imaging train, which preserves spacing.
  • Ring spacing on the bar: Rings placed further apart resist flexure better; too close together and a long tube can pivot under load.

Why Choose David Astro for Tube Rings

Ring fit is a measurement problem, and a wrong measurement is an expensive return.

  • Model-based sizing: Tell us the telescope model and we will look up the actual tube diameter rather than asking you to estimate it.
  • Balance planning: We advise on ring spacing and dovetail length together, since rings positioned to balance a heavy camera can end up too close for good rigidity.
  • Accessory mounting considered: If you intend to carry a guide scope, we recommend rings with usable top mounting rather than adding a bracket later.
  • Authorized dealer: Genuine hardware with full manufacturer warranty, held in our Canadian warehouse.
  • Ships from Canada: No duties or brokerage fees for Canadian buyers.

Tube Rings in Canada — Frequently Asked Questions

How do I measure for tube rings?
Measure the outer diameter of the tube itself at the point where the rings will clamp, not at the dew shield or the focuser end. If you can give us the telescope model we can usually confirm it directly.
Can rings be slightly oversized?
A few millimetres can be taken up with additional liner material, but a significant mismatch causes uneven clamping and can mark the tube. It is better to get the correct size.
How far apart should rings be?
As far as balance allows. Wider spacing resists flexure and rotation better. If a heavy camera forces the rings forward and close together, consider a longer dovetail instead.
Do I need rings if my telescope has a fixed dovetail?
Not necessarily, but rings add the ability to rotate the tube for framing and to mount accessories on top, which a fixed foot does not offer.

Need the right ring size?

Send us your telescope model and we will confirm the diameter. Canadian stock, fast domestic shipping.