I have a couple of DIY things. 1st one that's really simple is a reversing ring for a 50mm 1.8. You need a body cap and a cheapie uv filter. remove element from the filter. Drill the center of the body cap out. Mate the two using epoxy and allow to dry. Mount the lens by screwing the filter into the lens. Adjust arpeture by first mounting 50mm to camera in Av Mode, depress DOF preview button, turn off camera and remove lens.