Hey. Since there´s no part that meet my needs, i decided to give it a try and design one on my own. basically its a canon EF bajonet on one side and a 1,25" inch tubing on the other side to fit in a microscope or a telescope so you can adapt your Canon Eos and other EF bajonet cameras on your microscope/telescope. the bajonet fits good in my canon eos600d. the part is a bit difficult to print, cause you must use support structures on this part and remove it later. i currently work on the same part, split into 2 part so you dont need that much support structures and ist easier to print though.