Products CNC manufactured for uniformity and precision.

Dobsonian Mounts
Height can be designed for comfort. Kit or finished. Solid or collapsible. Variations avaialbe:

Mount only, or
... with fitted alt. bearings, or
... with clamshell rings and bearings
New and available:
6" f8, 8" f6 mount/bearing kit $189.50

Altitude Bearings
New: Turn 5" into 12" Big Bearings.
New: Mirror box bearing supports.
Small bearings fit to tube curve.
Large bearings for mirror boxes.

Add bearings to your existing rings.

Mirror Cells
New: 6" low cost, 3 point support.
Standard 8" - 12.5", 6 point flotation.

Universal for conical or standard.

Clamshell Rings
Dovetail plate mount Newtonians on these heavy duty or
lightweight rings.

Kydex Light Baffles
New: Eliminates stray light.

ATM parts
New: Round Teflon improves motion.
Teflon altitude and azimuth pads.
FRP bearing strips, azimuth rings.
Aluminum tubes.
Tube end rings

Astro Club Discount Program

Discounts & Leftovers.
FRP azimuth disks and rings.

Customer Comments

Custom Work / Who Are We?

Mirror Cells

Optimized Standard 8", 10" and 12.5" Mirror Cells
Optimized 6" Mirror Cells - in stock

What is meant by "Optimizied"? All mirrror cells we supply have the best support positions calculated using the optimization program PLOP. 6" mirror cells have felt pads applied at the optimal mirror support positions. Support arm position for 8" and larger mirrors is also calculated on PLOP. Optimization eliminates stresses that can distort the image improper support placement can produce. We also provide mirror clips cut to within 1/8" of the mirror's front surface.

Min. Tube ID

Order Here

0.8 lbs.
Standard Mirror Cells

 After your order is placed
you'll be taken to a form to enter:
(1) mirror diameter, (2) mirror thickness,
(3) focal length or ratio, (4) secondary size.
 8.0"  $100
1.0 lbs.
 10.0"  $120
1.2 lbs.
12- 12.5" $140
1.4 lbs.
We can build the rear cell plate to match larger tube inside diameters. Check the appropriate box on the form after ordering. Add $30.

Universal Mirror Cells - in stock


Top view of Universal Mirror Cell

Fits standard mounting or conical mirrors from 8" to 13.1".

Comes with three adjustable tube supports.
Optional mirror clip sets are adjustable height.

 Universal Mirror Cell for 8" to 13" primaries.
 Mirror Clip Set (3)

Universal Mirror Cell materials and specifications.

The Universal Mirror Cell fits a minimum 8-3/8" interior dimension tube. Two 1/2" Baltic Birch plywood plates contain 2-1/4" hex head bolts held securely in the top plate. Washers under the top plate cap heavy duty flat ended springs that ride on the bolts between the top and bottom plates. Bottom of springs are captured in wells in the top of the bottom plates. Bolts pass through bottom plate, washers and contained by the collimating knobs. The tube supports are 1/8" aluminum, which can also be used as mirror clip assemblies. Wooden parts painted flat black.

Weight: 0.85 lb.
Height: 2.75" from back of collimation knobs - can be made 0.375" (see mounting below).
Mounting: Uses 1/4-20 screws - three available positions - see this image.
1.  0.375" forward of the rear plate.
2.  0.375" back of the rear plate.
3.  0.875" back of the rear plate.
Optional Mirror Clip Set adds 0.1 lb.