LEX 35mm film digitizer by bostwickenator

Last crawled date: 3 years, 1 month ago

Check out version 2 if you want to use less printed parts!
This is in essence a 1:1 "enlarger". It uses a standard 50mm (M39 mount) enlarger lens of your choice to hold your film perfectly for digitizing it with a Sony E-mount camera. The design is semi parametric so you can adjust the lengths of the tubes if you need to remix this for a different lens mount.
The threaded tubes are designed with a buttress thread. This avoids issues when printing the threads as there are no overhangs. The threads are designed on the loose side. If you require them tighter just add some Teflon tape after printing to snug them up.
Make sure to print the parts in a plastic that isn't transparent. It will save you a lot of spray painting.
Glue the swivel lock only to the mount so that the whole device can be rotated relative to the camera without adjusting the focus.
The film holder itself is designed to be spring loaded using 3mm cap head screws and a compression spring between the nut and film holder. If you don't have a 3mm bolt use a small section of 3mm filament.
The cut away shows the lens installed in a "facing forward" configuration but you may wish to install it facing in the opposite direction as this is more in line with the normal use of an enlarger lens.