Customer comments and photos.
Dobsonian Mounts

Standard solid

Which mount is best for you?

Manual or Digital setting circles.
1 mount for 2 telescopes? Yes!
Stands to raise height
Image Sharpening Masks

:  Fix Turned Down Edge.  
Imaging: Remove mirror clip flare.
Aperture: Eliminate spider spikes. 
OOptimized Mirror Cells

Clamshell & Rotating Rings

For Dobsonian mounts
For Equatorial mounts

Clamshell And Rotating Ring Combinations.
For up to 14" O.D. tubes. E-mail for larger sizes and shipping estimates.

Mount your telescope tube without drilling holes into it. Custom designed to fit telescope tubes up to 14" O.D.

Clamshell rings close using thumbscrews fitting though the side of the top clamshell board and screwing into a 1/4-20 insert in the abutting board. Loosening the thumbscrew allows movement of the tube forward or back, or turning it for convenient eyepiece position. Rotating rings are contained in a clamshell ring and are essentially the same as the clamshell, but provides very easy smooth rotation of the tube for convenient/comfortable eyepiece and finder positioning. Rotating rings do not allow forward or back movement of the tube. Rotating the tube is advantageous when observing low to the horizon; rotating the eyepiece upward. When near zenith, turn the tube and position the focuser toward the side to avoid leaning out over the telescope.

Clamshell Rings Only:
For Equatorial Heads.

We will match your mouting hole size and center to center dimensions.

Tube diameter:

Clamshell Rings With Altitude Bearings:
For Dobsonian Mounts.

Clamshell Rings with altitude bearings to match dimension between mount side boards. Requires 1.625" minimum space between tube and side boards..

Tube diameter:

Clamshell Rings With Internal Rotating Rings:
With And Without Altitude Bearings.

Mount without bearings on an equatorial head, or with beairngs on a Dobsonian mount. Combine a clamshell ring and an internal rotating ring. The rotating ring spins freely inside the clamshell rings. A nylon screw through the top front outer ring (see hole in right photo) tightens against the inner ring to preferred friction, or locks rotation completely.

Tube diameter:


Additional Ring Sets:
Mount Smaller Tubes In Same Clamshell.

Available for equatorial or Dobsonian mounts. Add additional smaller telescope tubes in the same set of clamshell rings. Quickly attach/detach with four socket head bolts. Left photo: one half of additional ring set removed (shown on ground) and 1/4-20 threaded insert visible in the larger diameter clamshell ring. Right photo: second set of smaller inside diameter ring segments installed.

Additional tube diameter:

Kit: All parts included, wooden parts are rough sanded with 80 grit, holes predrilled. All parts dry-fitted before shipping. Kits may be shipped worldwide.

What you'll need: Philips screwdriver, sandpaper, wood glue.

Materials: CNC precision cut 3/4" Baltic Birch plywood. Anodized heavy duty aluminum piano hinge. Steel wood screws. Clamshells open and close using a 2-1/4" thumb screw that passes through one of the top boards into a 1/4-20 brass threaded insert in the abutting board. Rings are cut 1/8" larger than tube circumference. 1/16" cork/rubber lining material included.