Desert Sky Astro Products
Quality astronomical accessories
Optical Tube Rings
Our optical tube rings are finely machined from 6061 Aluminum
with stainless steel hardware. These rings are hinged and have
quick release knobs for easy installation and adjustment on
your optical tube.

90mm ID tube rings:
  • Fit popular 80mm and 90mm refractors that have a 90mm
    OD otical tubes, such as William Optics ZenithStar 80ED
    and Megrez 90FD, Astro-Tech 80ED and Others.
  • Each ring has flat bosses on top and bottom with three 1/4-
    20 tapped holes each. One hole is centered on boss and
    the other two are 60mm apart centered to the center hole.
  • Thick felt protects your OTA from scratches.
  • Two 1/4-20 x 1/2" stainless steel caps screws provided per
    ring.
  • $65.00 per pair + $6.00 shipping within continental US

75mm ID tube rings:
  • Fit popular 66mm refractors that have a 75mm OD optical
    tubes, such as William Optics ZenithStar 66SD, Astro-Tech
    66ED, etc.
  • Each ring has flat bosses on top and bottom with one 1/4-
    20 tapped hole each. Hole is centered on boss.
  • Thick felt protects your OTA from scratches.
  • One 1/4-20 x 1/2" stainless steel caps screw provided per
    ring.
  • $60.00 per pair + $6.00 shipping within continental US
Contact and ordering information:
1625 E Villa Theresa Dr, Phoenix AZ 85022
Tel. (602) 550-4331
Email: desertskyastro@cox.net