Thanks for the info. I downloaded a system chart for PT-EP10 just for information. It has this: ""M.ZUIKO DIGITAL ED 12-50mm F3.5-6.3 EZ*....*1 Automatically when the camera mode is set to UW wide mode, the zoom position moves to WIDE, and when the camera mode is set to UW macro mode, the zoom position moves to TELE . It is effective when the zoom switch is set to E-zoom." I had (mistakenly, I guess) read this to mean that the camera could make the lens go into macro mode. I But I suppose it doesn't say that, only 'tele', which probably just means 50mm. It's impossible to find confirmation through Olympus on what works with what for their underwater equipment. I knew there was a zoom gear for the 12-50mm, but it only shows in later camera housings (because I guess it didn't exist when the E-PM1 was released. So I was unsure if that zoom gear would work with older housings. I really think it'd be great to have a wiki that collects all this information. Because you can read conflicting things all over the place on forums. For instance, the 45mm macro--some say it works in the default port, some say it does but not well, some say it doesn't at all.