Please Note: We cannot ship Astro-Physics products to customers in Germany, Switzerland, Austria, France and Japan.

This sight hole cover threads onto the back of all 900GTO mounts shipped since October 2005. One of these aluminum covers is included with all new mount purchases, but now they are available separately for anyone who needs one.

SILVER BASE COVER, AZM Base cover for the CPC series only

This a genuine Celestron part.  Please note that this item cannot be returned due to uncertain factors in DIY product repair and as such Woodland Hills and Celestron are not responsible for any damage caused by repairs or attempted repairs performed at home. Be sure of the steps, before you start.  Contact Celestron technical support at 310-803-5955.

The Integrated Guider Port (IGP) built into 500 Series WSG models is designed to support any camera with 12.5mm of back focus or less that can be attached using C-mount or T-mount threads.