SkyWatcher mounting rings for 250 mm...
The SX-AO-USB is an updated and improved version of the AOLF unit that was launched in 2008. It adds an internal USB to serial converter, so that a direct USB connection may be used, and the stepper motor drivers have increased torque capability to ensure optimum performance under all conditions.
Starlight Xpress Adapive Optics Guiding System without OAG. This version comes without off-axis guider so it can be use with any CCD camera that already has an OAG, such as the QSI ccd cameras and many others.