ASToptics CNC Guide Scope Rings 90 mm This pair of 90 mm CNC guide-scope rings provides adjustable support for a guide telescope with an outside tube diameter of 45–80 mm. Six adjustment points across the pair allow the guide telescope to be aligned relative to the main optical tube.
Manufacturer model: ASToptics CNC Guide Scope Rings 90 mm · Specifications checked against manufacturer data on 2026-11-03
This pair of 90 mm CNC guide-scope rings provides adjustable support for a guide telescope with an outside tube diameter of 45–80 mm. Six adjustment points across the pair allow the guide telescope to be aligned relative to the main optical tube.
Construction and mounting
The rings are made from aluminium. The manufacturer lists 270 g for the pair, expressed as two 135 g rings. The quoted guide-tube range describes the usable external tube diameter, rather than the telescope’s clear aperture.
Compatibility notes
Published weight is for the pair. Select using guide-tube outside diameter, not objective aperture.
Additional specifications
Alignment
Six-point adjustment across the ring pair
Pair weight (g)
270
Individual ring weight (g)
135
57829
Data sheet
Guide tube outside diameter
45–80 mm
Material
Aluminium
Model
ASToptics CNC Guide Scope Rings 90 mm
Nominal ring size (mm)
90
Quantity
2
Used this product? Share your experience with other astronomers.
Comments (0)
No customer reviews for the moment.
Your review appreciation cannot be sent
Report comment
Are you sure that you want to report this comment?
Report sent
Your report has been submitted and will be considered by a moderator.
Your report cannot be sent
Write your review
Review sent
Your comment has been submitted and will be available once approved by a moderator.
ASToptics CNC Guide Scope Rings 90 mm This pair of 90 mm CNC guide-scope rings provides adjustable support for a guide telescope with an outside tube diameter of 45–80 mm. Six adjustment points across the pair allow the guide telescope to be aligned relative to the main optical tube.
Manufacturer model: ASToptics CNC Guide Scope Rings 90 mm · Specifications checked against manufacturer data on 2026-11-03
