Thomas Lam from Nauticam deserves a lot of credit for taking the time to actually measure these (and basically every other lens on the market). The measurements were actually done twice by Thomas, and verified by Alan Dewey at Reef Photo.
The CMC magnification table listed in the press release is actual measured data, in water.
Working distance is measured from the front of the housing port, or front of accessory lens. It is the actual space between the underwater system and subject.
All of the systems listed achieved their best "native" magnification at their widest focal length, and very close to the subject.
All of the systems listed achieved the magnifications listed with CMC are at full telephoto. It is possible, but not likely that some of these could actually have slightly better magnification if you pulled the zoom back a couple of clicks. In the interest of consistency we didn't try to establish these situations. We wanted repeatable results.
CMC isn't just a simple diopter, so I'm going to try to resist those comparisons. The actual end magnification with today's top compacts (RX100m3, G7X, and LX100) was in line with simple housed +15 diopter macro lenses. There were noticeable image quality differences, though.
- ChrigelKarrer likes this