Alright, since the Nauticam CMC-1 is out, it's time to get back on Macro discussion again. It seems like with the Nauticam CMC-1, the LX100 can shoot up to 32mm subject?
http://www.nauticamusa.com/news/2015/2/3/the-cmc-has-arrived
It's also now clear that why the macro flip diopter holder has such a big gap from the rectangle port to the rear of the dilpter holer: CMC-1 has a protruding rear lens element
I just receive my Aquako IV diopter, which is rated to be strong the SMC (see it here http://wetpixel.com/forums/index.php?showtopic=53387&p=349044),so I would assume it's stronger than the CMC-1. The Aquako IV is 52mm thread and with a 52mm to 67mm step up, it's causing vignette just like the Subsee +10, but worse.
There are two possible solutions for the vignette issue with the Subsee+10 and the Aquako IV. I will do a write up this weekend. I sent the diopter flip holder to a machine shop to make modification so the 67mm thread will be sitting right on top of the rectangle flat port, solving the vignette issue. With that said, now it will be a battle of "CMC-1 vs Aquako IV". I will test the Aquako IV at the pool this weekend.
If you have specific things you want me to test, make a list here and I will make a note. These are the thing I plan to test:
1.) LX100 at 75mm with the Aquako IV on modified flipt diopter (if I can get less than 32mm, then it beats the CMC-1).
2.) Working distance using the Aquako IV
3.) Stacking +7 or +5 on the Aquako IV 