This Adapter is an accessory to the SBIG AO-7 device to allow the proper spacing when using a .63x focal reducer.
Description from the FLR web page:
A shortened fixed version of the Adapter Tube is also available, that places the focal reducer 1/8 inch from the T-thread adapter on the AO-7, reducing the overhang by almost 1 1/2 inches and moving the optical train into the focuser draw tube by about 1 1/2 inches. This short tube adapter is best suited to the C-11 and Meade 12".
This adapter DOES have the Celestron .63x optics installed.
Condition: Only used once. Item is in excellent condition.
Reason for Selling: New setup on the way, plus item is rarely used.
Price New: $235
Your Price: $170 shipped in CONUS
Thanks for looking,