As you probably know,  I totally remodeled my 10″ GSO RC into a truss version. The day the OTA arrived at my place, the saw went into it’s nice spotless white tube. I ended up with this prototype on the 21st of April, 2010: This is the final version displayed at my observatory section. (photo

A pain! Why? Cause Atik’s inside T-thread only spans 2.5 mm.! An astro-buddy asked me to make one on the lathe. He already bought an adapter for Canon bayonet to 60 mm. with a 0.75 thread. Canon lenses have a back focus of 44 mm.. The Atik front to ccd distance is 17 mm., so