The Vixen Atlux Accessory Plate is used when you want to simultaneously attach a telescope mounted in the Vixen GP-and-SX-series tube rings as well as a secondary guide scope to the Atlux mount. To do this, you'll also need two other pieces; the #8779 Atlux Base Plate and the #3810 Dovetail Plate Mounting Block.
You attach the #8779 Atlux base plate directly to the Atlux mount head, then affix the #3810 Dovetail Plate Mounting Block to the base plate, and finally the Atlux Tube Plate fits into the #3810 Dovetail Plate Mounting Block.
The large 15.7 x 7.7" (400 x 195mm) surface of the Atlux Accessory Plate is fitted with many various threaded and unthreaded holes to accommodate a wide variety of guiding scopes, cameras, etc.
In the Box
Vixen Optics Atlux Accessory Plate - Allows Tube Rings & Guide Scope Upon Atlux Mount