I own a Nauticam housing for Olympus E-PL3. Recently Olympus came out with a 12-50mm zoom lens (equivalent to 24-100 full frame) that also can be shifted to macro mode. This seemed like a good all purpose lens when you are going down without a specific objective. Moreover, it is better quality than the 14-42mm kit lens. The problem was that there were no zoom gear for this lens. Nauticam came out with a special purpose port and zoom gear (costing $800 in the states) that also allows shifting to macro. This is one of the most complicated gears I ever run into (see http://reefphoto.com/kb.php?id=41).
I decided to use the new home 3D printer I bought for my wife (PP3DP Up!) and see if I can generate something that is a bit cheaper. I already own a port that is compatible with the lens, so the only issue is the zoom gear. Here is what I came up with. I call it V1.0, as I have ideas/plans on how to make a version that will allow the shift to macro. This shift requires pressing on a button on the side of the lens (no problem, the current gear is already pressing on it) and shifting the zoom ring forward (which is a bit more complicated).
Comments/ideas are welcome. Will be happy to share the design.
Edit: I uploaded the design here - http://www.thingiverse.com/thing:36320
Edited by ProfF, 01 December 2012 - 06:51 AM.