M43 & NEX adapter for Taylor Hobson Hypertal lens

cults3d

Two adapters for a TTH 32mm Hypertal lens, in a 2" (52.3mm) diameter projection mount. The back of the projection mount is a fine helicoid thread. Originally I planned to use fine wires pushed through the print to act as a receiving thread, but once printed I found this wasn't necessary, the lens engaged on the rough inside of the PLA/FDM print. After some use, it is a little loose but still screws in and out to focus (a layer of masking tape in front of the screw thread helps too). Aside, the lens head sits deep inside the projection mount (because it is only 32mm focal length), so the shade of the mount causes vignetting on the corners of APSC and M43rds. There is no vignetting on BMPCC4k. The adapters may work for longer focal lengths and there would be no vignetting. (I've no suitable lenses to try). Pictures show the style of the lens mount, if you have similar projection lenses.