This large photographic field flattener is made for our f-7 refractors. It threads to the rear of the Feather Touch 3” focuser. This flattener uses the standard 42 mm t-thread for camera attachment. Your DSLR and a standard t-ring will attach to this flattener, providing a completely threaded mounting solution for larger chip cameras when used with the 3” Feather Touch focuser. When using a CCD astro camera, spacer rings and/or extension tubes may be required. If you are not sure about your particular requirements please contact us at (530) 823-7796 Monday - Friday 9-5 Pacific Time so that we can assist you in getting precisely what you need.
PLEASE SELECT THREAD SIZE