William Optics 90mm CNC Tube Rings

William Optics 90mm CNC Tube Rings

  (1 Review)
✓ 2 year warranty


5x in stock shipped 1-2 working days

About this product

Model:  WO90mmRings
Part Number:  M-M80R-B

These 90 mm, felt-lined mounting rings are made from solid Aluminium, black-anodised, and will fit all William Optics 80 and 90mm telescopes and most other 90 mm OD tubes.   

A worthwhile investment.

  • Each ring has 3x three holes top & bottom (M6 metric threading) for mounting on most dovetail plates and WO dovetail plate. Outer hole centres are spaced 30mm apart. 
  • Supplied with 4x screws for attaching to dovetail. 
  • Nice comfortable knobs with teflon paint protection on locking end.
  • Felt-lined to protect even the most delicate telescope finish.

Customer reviews

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Lovely rings
29 September 2022  | 

Decided to upgrade my dovetail bar mount on my Sky watcher Evostar 90, as it wasn't particularly well balanced when using heavy eye pieces. Sky watcher had a cheaper set of rings available, but having an Altair scope with machined aluminium tube rings which are great quality I decided to spend more than I wanted to on these tube rings and I wasn't disappointed. The quality and finish of the product is excellent, the fit around the scopes tube is perfect, once the thumb screws are tightened up it feels really secure, coupled with an Altair carry handle I feel very confident transporting the scope around and knowing that it will attach firmly to my mount and I can balance the scope correctly.


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