Yes I know, the 12-50 has a rather expensive port + zoom gear. I haven't started adding prices yet, but of course it matters.
No, I would definitely want the float collar. I'll check the pockets I have, but I suspect you're right. They are quite roomy (Hollis thigh pocket, https://www.hollis.c...n-thigh-pocket/) but the whole WWL-1 with collar sounds optimistic.
The WWL is definitely a great option for wide angle stuff, no question about optical quality, I think the idea of taking it off mid dive and playing macro is where the questions lie, it weighs 160gr underwater with buoyancy collar, so your rig is suddenly 160 gr lighter when you remove it - if you put it on an arm on the rig that problem goes away, but if you put it in a pocket, then your rig is suddenly lighter which means you need to have the rig at least 160 gr negative if you want to remove it. A slightly positive rig can be painful particularly for macro, I dived with a rig that I would guess was <100gr positive once and it was difficult to use for close work. There's a whole thread on what to do with a WWL on the video forum here on wetpixel right now.
On the topic of Low ISO, in theory yes you lose some range when using the low ISO option, but is that something you really need underwater? Maybe for sun balls but the differences as measured by DXO are almost trivial. By way of example I found this post: http://wetpixel.com/forums/index.php?showtopic=64240#entry407528 with photos taken with a Canon D80 which is about average between the Sony and the Olympus in performance: https://www.dxomark.com/Cameras/Compare/Side-by-side/Canon-EOS-80D-versus-Olympus-OM-D-E-M1-Mark-II-versus-Sony-A6400___1076_1136_1281 to me the performance on the sun balls is pretty damn good and I believe the Olympus should be able to do something quite similar. T
For me at any rate I would use other criteria than sensor performance as a selection criteria for example the Olympus has a 1720 mAhr battery while the Sony has a 1080 mAhr battery they may consume at different rates of course, the CIPA ratings are 360 shots for the A6400 and 440 for the Olympus. The A6400 is reported to be much improved over the A6300/6500 but looks like it still falls well short of the olympus performance for number of shots. The lens selection from Panasonic and Olympus is also much better, including two native fisheyes to choose from. As you mention flash sync is limited to 1/160 and also no manual option. The little accessory flash that comes with olympus can be set at 1/64 power on manual to trigger strobes preserving battery power and it reliably triggers my INON Z-240s.
- echo2600 likes this