Tamron Adaptall 2 Base/Bottom/Rear Cap

cults3d

This is a replacement end cap to protect the rear element of Tamron Adaptall 2 lenses without an adaptor attached. The original rear caps are notoriously fragile, a situation that has worsened due to age and the plastics becoming brittle. Those that are available cost a ridiculous amount, so I decided to design my own. Although the overall height is less than the original, internally there is more height clearance. I've tried the design on a number of lenses including the SP 2x Teleconvertor which has a protruding rear element. I printed in PLA with no supports. Seems to be strong enough.