Fine azimuth adjuster. Roller bearing wheels also roll on flat surfaces or angle iron tracks by customer. Prices includes palletizing and wrapping for motor freight. More details at Rolling Base page. Internal T-thread is removed.
Entire coupler rotates with camera body.
Image similar to SLR coupler. Other types quoted upon request. These are made from light weight nylon and have breathable flaps at the mirror end. They are water and dust proof. Must be requested at time of order since the telescope controller circuit is modified for higher voltage.