Need to take some macro shots, but don't want to get a dedicated macro lens? Try out a reversing ring.
Currently, 30.5mm-127mm lens filter threads are supported (nearly every size), although the larger rings might not fit on your specific camera due to the camera grip. E-mount cameras without a grip can fit pretty much any arbitrary size.
A solidworks file is included for you to make your own adjustments!
Print with normal snug supports with the lens filter thread facing down and the E-mount facing up.
The author remixed this model.
Thanks to Elijah Trufakin for the original model. The CAD file was modified to become a reversing ring instead. Solidworks file provided for you to create a ring for any arbitrary filter size.