Atik OAG Prism dimensions

[kookoo_gr]

I am trying to set up an FOV for my guide camera with stellarium and it needs the prism dimensions of the OAG. Since i have my camera rig mounted on my scope and i don't want to ruin the rotation of the camera for my next imaging session can someone provide me with the dimensions of the prism of the ATIK OAG?

[Merlin66]

I’d start with a 6 x 6mm size......when you see and record a guide image you can refine the size.