I used an EOS to "T" mount adapter and made a small part to fit some old bellows I had to my new Canon 300D. The lens used is a 50mm f1.8 FD lens from a Canon FTb 35mm camera. The focus is somewhat hard to do but by stopping down the lens, some depth of field can be acheived.. As can be seen by the ruler, some pretty small objects can be photographed, each single division is 0.01" (ten thousanths).