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Rings

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.

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$335.00 - $335.00
$335.00
$335.00 - $335.00
$335.00

PrimaLuceLab 155mm PLUS Support Rings

PLL-PLLANSU155P

Internal Diameter: 155mm Compatible with Takahashi FS-152 and TOA-130 refractors Part of the PrimaLuceLab PLUS modular system CNC machined from a ...

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$335.00 - $335.00
$335.00
$335.00 - $335.00
$335.00
$345.00 - $345.00
$345.00
$345.00 - $345.00
$345.00

PrimaLuceLab 168mm PLUS Support Rings

PLL-PLLANSU168P

Designed for optical tubes with a 168mm diameter Part of the PrimaLuceLab PLUS modular mounting system Precision CNC-machined from a single alumin...

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$345.00 - $345.00
$345.00
$345.00 - $345.00
$345.00
$355.00 - $355.00
$355.00
$355.00 - $355.00
$355.00

PrimaLuceLab 180mm PLUS Support Rings

PLL-PLLANSU180P

180mm Internal Diameter Compatible with Takahashi TOA150 and similar OTAs PrimaLuceLab PLUS System Integration CNC-Machined from a Single Aluminum...

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$355.00 - $355.00
$355.00
$355.00 - $355.00
$355.00
$475.00 - $475.00
$475.00
$475.00 - $475.00
$475.00

PrimaLuceLab 235mm PLUS Support Rings

PLL-PLLANSU235P

235mm Internal Diameter CNC-Machined Aluminum Construction Hard Anodized for Durability Part of the Modular PLUS System Universal Hole and Slot Pa...

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$475.00 - $475.00
$475.00
$475.00 - $475.00
$475.00
$149.00 - $149.00
$149.00
$149.00 - $149.00
$149.00

PrimaLuceLab 80mm PLUS Support Rings

PLL-PLLANSU80P

80mm Internal Diameter for Compact Refractors and Telescopes CNC-Machined from a Solid Aluminum Block for Maximum Rigidity Part of the PLUS (Prima...

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$149.00 - $149.00
$149.00
$149.00 - $149.00
$149.00
$195.00 - $195.00
$195.00
$195.00 - $195.00
$195.00

PrimaLuceLab 85mm PLUS Support Rings

PLL-PLLANSU85P

Designed for 85mm Diameter Telescope Tubes High-Precision CNC-Machined Aluminum Construction Hard-Anodized for Durability and Corrosion Resistance...

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$195.00 - $195.00
$195.00
$195.00 - $195.00
$195.00
$205.00 - $205.00
$205.00
$205.00 - $205.00
$205.00

PrimaLuceLab 90mm PLUS Support Rings

PLL-PLLANSU90P

Fits 90mm Diameter Optical Tubes Part of the Modular PLUS System CNC-Machined Aluminum Construction Weight: 0.5 kg Multiple Threaded Holes and Slo...

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$205.00 - $205.00
$205.00
$205.00 - $205.00
$205.00
$215.00 - $215.00
$215.00
$215.00 - $215.00
$215.00

PrimaLuceLab 95mm PLUS Support Rings

PLL-PLLANSU95P

Internal Diameter: 95mm Material: CNC-machined aluminum Finish: Sandblasted and hard-anodized Mounting System: PrimaLuceLab PLUS Compatible Telesc...

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$215.00 - $215.00
$215.00
$215.00 - $215.00
$215.00
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$1,695.00 - $1,695.00
$1,695.00
$1,695.00 - $1,695.00
$1,695.00

Software Bisque C11 OTA Mounting Rings

SB10327

Engineered for Celestron C11 and RASA 11-inch optical tubes Pre-drilled for direct attachment to Paramount ME II, MX/MX+, and MYT Versa-Plates Tot...

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$1,695.00 - $1,695.00
$1,695.00
$1,695.00 - $1,695.00
$1,695.00
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Sold out
$1,695.00 - $1,695.00
$1,695.00
$1,695.00 - $1,695.00
$1,695.00

Software Bisque C14 OTA Mounting Rings

SB10324

Designed for Celestron C14 and RASA 14-inch OTAs Direct-fit for Paramount ME II, MX/MX+, and Taurus 400 mounts Total Weight: 15 lbs Supports top-m...

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$1,695.00 - $1,695.00
$1,695.00
$1,695.00 - $1,695.00
$1,695.00
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Sold out
$1,695.00 - $1,695.00
$1,695.00
$1,695.00 - $1,695.00
$1,695.00

Software Bisque MEADE 14" OTA Mounting Rings

SB10333

Engineered specifically for Meade 14-inch optical tube assemblies Provides a direct, secure fit to Paramount mounting systems Total set weight of ...

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$1,695.00 - $1,695.00
$1,695.00
$1,695.00 - $1,695.00
$1,695.00
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Sold out
$1,845.00 - $1,845.00
$1,845.00
$1,845.00 - $1,845.00
$1,845.00

Software Bisque MEADE 16" OTA Mounting Rings

SB10323

Designed specifically for Meade 16" Optical Tubes Total Weight: 16 lbs Direct fit for Paramount ME II Versa-Plate Direct fit for Paramount Taurus ...

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$1,845.00 - $1,845.00
$1,845.00
$1,845.00 - $1,845.00
$1,845.00
Sold out
Tele Vue 3 Ring Mount - Satin 1
$165.00 - $165.00
$165.00
$165.00 - $165.00
$165.00

Tele Vue 3" Ring Mount - Satin

TV-RS3-8003
1 in stock

Telescope Compatibility: Fits any 3-inch (76.2mm) outer diameter tube Mounting Interface: Three 1/4"-20 tapped holes Accessory Interface: Dual top...

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$165.00 - $165.00
$165.00
$165.00 - $165.00
$165.00
Tele Vue 4 Ring Mount - Satin 1
$198.00 - $198.00
$198.00
$198.00 - $198.00
$198.00

Tele Vue 4" Ring Mount - Satin

TV-RS4-8004

Fits: Tele Vue TV-102, NP101, and other 4" diameter tubes Mounting: Direct attachment to Tele Vue mounts or Vixen-style dovetails Hinge Type: Clam...

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$198.00 - $198.00
$198.00
$198.00 - $198.00
$198.00
Tele Vue Mt. Rng Set for 4" OTA 1
$343.00 - $343.00
$343.00
$343.00 - $343.00
$343.00

Tele Vue Mounting Ring Set for 4" OTA

TV-MRS-4011

For tubes exactly 4" in outside diameter (NP101/NP101is) Bat-handle locks Two accessory channels per ring (#10-32 tapped) 1/4"-20 tapped hole top ...

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$343.00 - $343.00
$343.00
$343.00 - $343.00
$343.00
Tele Vue Mt. Rng Set for 5" OTA 1
$359.00 - $359.00
$359.00
$359.00 - $359.00
$359.00

Tele Vue Mounting Ring Set for 5" OTA

TV-MRS-5000

Designed for Tele Vue 5" (127mm) Optical Tubes Hinged Clamshell-Style Rings Felt-Lined for OTA Protection Multiple 1/4"-20 Threaded Mounting Holes...

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$359.00 - $359.00
$359.00
$359.00 - $359.00
$359.00
$50.00 - $50.00
$50.00
$50.00 - $50.00
$50.00

William Optics Cat Mounting Ring

WO-M-MR50RC-BL

50mm Inner Diameter Solid Aluminum Construction Anodized Blue Finish 1/4"-20 Threaded Mounting Holes Weight: 4.9 oz (140 g) Description FAQ Spe...

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$50.00 - $50.00
$50.00
$50.00 - $50.00
$50.00
William Optics Mounting Ring for Z61
$99.00 - $99.00
$99.00
$99.00 - $99.00
$99.00

William Optics Mounting Ring for Z61

WO-M-R-61BL-P

Designed specifically for the William Optics ZenithStar 61 I Provides a secure, rigid mounting point for the optical tube Features an integrated C...

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$99.00 - $99.00
$99.00
$99.00 - $99.00
$99.00
$178.00 - $178.00
$178.00
$178.00 - $178.00
$178.00

William Optics Mounting Rings 90mm

WO-M-M80R-B

Precise 90mm Inner Diameter Solid, All-Metal Construction Secures Optical Tube for Astrophotography Requires User Measurement for Fit Confirmation...

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$178.00 - $178.00
$178.00
$178.00 - $178.00
$178.00
$76.00 - $76.00
$76.00
$76.00 - $76.00
$76.00

William Optics ZenithStar V1 Upgrade Mounting Ring

Options available

Allows for simple installation Made with improved CNC for greater rigidity Description The William Optics ZenithStar V1 Upgrade Mounting Rin...

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$76.00 - $76.00
$76.00
$76.00 - $76.00
$76.00
$49.00 - $49.00
$49.00
$49.00 - $49.00
$49.00

ZWO 78mm Holder Ring

ZWO-RINGD78
12 in stock

Securely mounts ZWO cooled cameras with a 78mm diameter body Locks with a single M6 screw on the side Mounting foot with two 1/4"-20 threaded hole...

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$49.00 - $49.00
$49.00
$49.00 - $49.00
$49.00
$59.00 - $59.00
$59.00
$59.00 - $59.00
$59.00

ZWO 90mm Holder Ring

ZWO-RINGD90
11 in stock

Engineered for a precise 90 mm camera body diameter Official fit for ZWO ASI2600 and ASI6200 Pro Cooled Cameras Features two 1/4"-20 and six M4 th...

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$59.00 - $59.00
$59.00
$59.00 - $59.00
$59.00

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.