Deluxe 2.5" field flattener for AIRY BLACK is specially designed for our AIRY BLACK apochromatic refractors and it generate a very large flat field, to use with cameras with big sensors, up to FullFrame (24x36mm). In this way, the pictures will be perfect, with pinpoint stars up to the edge of the field!
Canon EOS DSLR connected (with Canon EOS-M48 ring) to the 2,5" field flattener: everything is then threaded to the AIRY BLACK focuser.
This flattener is directly screwed to the thread back on the focuser's tube of the telescope: in this way you avoid the unwanted flexures! In the camera side, it has a M48 thread for connection to DSLRs (it requires M48 ring) or cooled CCD cameras. In order to obtain the best performances, you have to set sensor position at 55mm backfocus distance from rear field flattener thread (for a DSLR camera, you simply connect the DSLR camera body to the field flattener using the M48 adapter).