Clamshell Rings
Heavy Duty
Light Weight
50% Deposit:
50% Deposit:

Place your telescope on an equatorial head. Clamshell ring are custom designed to closely match the diameter of your OTA, leaving just enough room to apply a felt lining or weatherstripping. Heavy duty rings are CNC cut to your mounting plate hole pattern assuring a precise match. Prices are for up to 12" tube diameter. Small additional materials charge added for larger, which we'll quote.

Kit: All parts included, wooden parts are rough sanded, holes pre-drilled. All parts dry-fitted before shipping. Kits may be shipped worldwide. What you'll need: Philips screwdriver, 150 grit and finer sanding paper, wood glue, adhesive backed felt.

Finished: Arrive ready to use, except fo adhesive back felt which you obtain and apply to desired tension.

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.

Payment is by PayPal or credit card via PayPal. You do not need a PayPal account. Clamshell rings require 50% deposit.

We will e-mail a PayPal invoice for the balance due plus shipping when your mount is ready.

For estimated shipping costs, e-mail or call with the telescope tube diameter and mounting plate dimensions. After your deposit is received, we will e-mail you to obtain all necessary dimensions:

Dimensions include diameter or circumference of your telescope tube, and the hole pattern and profile of the plate the rings will attach to - the plate manufacturer's drawing reference is very helpful.