Shade & coupler for reversed Pentax K lens macro

thingiverse

There are two parts for reversed-lens macro photography here. See http://extreme-macro.co.uk/single-reverse-lens/ One is a 49mm male-to-male coupler for stacking a reversed lens on a normal lens. Be cautious with this as the threads a pretty fragile. I'm using it as a temp, but will ultimately switch to metal. The second piece is a shade to protect the rear element of the reversed lens. This is a remix of M600's Pentax K lens base cap, with a hole punched in it and a cone grafted on. These are also on Tinkercad.