Micro 4/3 to EF Adapter

thingiverse

This adapter works with both EF and EF-S lenses. The difference between the flange distance of M4/3 and Canon EF is 24.75mm, which is the main dimension of this part. The EF mount is modeled largely off of existing extension tubes on Thingiverse, and the M4/3 mount is based off of existing M4/3 adapters, and some trial and error. A technical drawing with all the critical dimensions is available, feel free to use to create more adapters. If you are looking to create adapters for the Micro 4/3 mount, I can provide part files and advice for designing them. The locking pin recess should work on most M4/3 cameras, I can verify that it works on a Panasonic GH4/5. Update 6/6/2016: I have added a locking pin for the EF side of the adapter, which works by first attaching the EF lens to the adapter, inserting the locking pin, the attaching the adapter to the MFT camera. The pin will be held in place when the adapter is attached to the camera, removing the need for a spring-loaded pin and release mechanism. This design was suggested to me by Wisnaeme (https://www.thingiverse.com/Wisnaeme), and it's a brilliant solution I don't think I would have come up with on my own, so many thanks to him. The part files for the updated design are mftef locking pin cut.stl (the main adapter body) and mftef locking pin.stl (the locking pin itself) There is also the option to print a file without the pin and glue in a metal rod (2mm) for a stronger locking pin. Print Settings Printer Brand: LulzBot Printer: Mini Rafts: Doesn't Matter Supports: No Resolution: .2 Infill: 20% Notes: For best results, the adapter should be printed EF side down.