• GEM tube rotating rings
  • Primary mirror masks
  • Standard mount and altitude bearings kit.
  • Custom mounts designed to your specs.
  • Two telescopes with one mount?
  • Maks and SCT and Newts (oh my!).
  • Tripod adapt a small Grab-and-Go Dob.
  • Digital setting circles.
  • Small bearings transformed to 12 inch!
  • Small bearings fitted securely to your tube.
  • Large bearings for mirror box or big tubes.
  • Bearing supports.
  • Bearings for existing Newtonian tube rings.

Clamshell Rings

  • Newtonian mounting on an equatorial head.
  • Building a mount? Add rings and bearings.
  • Lightweight rings for smaller telescopes.
  • 6" low cost optimized.
  • 8" - 12.5" mirror optimized 6 point flotation.
  • Universal for conical or standard mirrors.

Streetlight Baffles

  • Eliminate light around your focuser.
  • Altitude and Azimuth Bearing Materials.
  • Aluminum tubes.
  • Tube end rings.
  • FRP azimuth disks and rings.

Mirror Cells
E-Mail for shipping estimates
Customer comments

Why purchase an optimized mirror cell? Optimization minimizes stresses that distort the mirror surface (glass is actually fluid and slumps) resulting in a degraded image. Proper mirror support placement produces an optimal image.

All mirrror cells we supply are calculated for the best support positions using an optimization program. 6" mirror cells come dotted at the optimal mirror support pad positions, which are virtually static across a wide range of focal lengths. We calculate 8" and larger mirror support pad positions individually for their
diameter, thickness and focal length, so your particular mirror is optimized. Our mirror clips are also cut to within 1/8" of you mirror's front surface so it is contained properly in the cell.

Standard Mirror Cells
Min. ID Needed
0.8 lbs.
Tube 7.6"
1.0 lbs.
Tube 9.0"
1.2 lbs.
Tube 11.0"
12- 12.5"
1.4 lbs.
Box: 13.5"
Minimum height between cell's top and bottom plate 1.875"
Cell 0.25" mounting holes are 0.354" from rear of back plate.

Primary Mirror Size

After your order is placed you'll be taken to a dimensions form to enter: (1) mirror diameter, (2) mirror thickness, (3) focal length or ratio, (4) secondary size.

Rear cell plate can be modified to match larger tube inside diameters. Check the appropriate box on the form after ordering. Add $30.
Standard 6" Low Cost Optimized.
Standard 8" - 12.5" Optimized 6 Point Flotation

Universal For Conical Or Standard Mirrors

Universal Mirror Cell

Fits a minimum 8-3/8" interior dimension tube. Two 1/2" Baltic Birch plywood plates contain bolts secured in the top plate. Heavy duty flat ended springs are secured on the bolts between the top and bottom plates. Bottom of springs are captured in wells in the in the bottom plates. Bolts pass through bottom plate and washers, and into the collimating knobs. The tube supports are 1/8" aluminum, which can also be used as mirror clip sets. Comes with three diameter and height adjustable tube supports shown at left. Wooden parts painted flat black.

Universal Mirror Cell
Universal Mirror Cell
For 8" to 13" mirrors.
 Mirror Clip Set (quantity 3)
Universal Mirror Cell materials and specifications.
Weight: 0.85 lb.
Height: 2.75" from back of collimation knobs. Knobs are 0.8125" tall.
Mounting: Uses 1/4-20 screws - three available positions - see above.
1.  0.375" forward of the front of the rear plate.
2.  0.375" back of the front of the rear plate.
3.  0.875" back of the front of the rear plate.
Optional Mirror Clip Set adds 0.1 lb.

Customer Comments

Standard Cells are a new product - we will post comments as received.

Universal Mirror Cell:

"Hi, I just received mirror cell. I am Very satisfied with quality, fast shipping and packing!!" Jo - Korea

"Hi Mark -I am very very very satisfied! I'll take it to the astronomy club of São Paulo and show my friends."
- M Corrêa, Brazil

"The cell actually looks and feels more sturdy then the impression the photos gave me." - J. Hackman