This odd setup is what I used to do a few very wide-field images with. It’s using an SBIG-STL6303E camera with an Nikon 180mm 180ED lens that yields a field of view of about 5.8 x 8.8 degrees. Guiding was done using a Televue APO 60mm f/6 with the SBIG-RGH, all sitting atop the Astro-Physics 900GTO and an ATS 10x36 pier. . .