The Vixen Accessory Plate DX is formed on the bottom to affix to Vixen's Great Polaris, GP2, GPD2, Sphinx, and SXD series mounts.  It also fits the many loving copies of the Vixen mounts, such as Celestron's CG-5 and Meade's LXD75 mounts.

This easily-mounted accessory plate permits a very wide variety of additional scopes to be used with the aforementioned mounts, and is a popular way for a user to have a main telescope and a guide telescope attached at once to their mount.