I currently use Olympus EM5-MII, NA-EM5MII, Zen DP170-N120, Nauticam 60mm Extension with Panasonic 7-14mm 4.0. Acccording to your data, shown in Alex's review, the WWL-1 with kit zoom-lens would perform better than this combination.
=> is this true in real life?
=> would the new WACP even perform better?
=> where is the rest of the data available (e.g. also center performance)?
In these combinations, the kit lens + WWL-1 is so good that I'm not sure how much benefit is left to be realized with WACP. In my personal opinion the real life benefits are greater than we can currently show in lab tests due to limits in our testing equipment and the extreme versatility and quality across the entire zoom range that WWL-1 offers. Further testing might change my opinion on this with some unique larger diameter lenses on m4/3, but I can recommend WWL-1 without hesitation.
I love the splits from Jeremy and David, and really like the drama in the thick and flowing water lines that splits with small domes create. They have a very different look, and that may not always be desirable, but appreciate the uniqueness and challenge to capture. The o-rign sourcing for WWL-1 was actually driven by a request from Eric Cheng using RX100 for high frame rates i the Bahamas, and I think the first o-ring that worked was a YS-250 strobe battery compartment o-ring.
Here is another review on WWL-1: https://www.bluewate...l1-review-tests
The conclusion is the opposite to the recent Wetpixel review: WWL-1 is simpler to use with MFT and FF (Sony), but image quality is better with WW-lenses plus dome ports.
In my own experience this style of testing makes it really hard to get consistent, controlled results. In my tests WWL-1 + 28mm was a bit narrower than the Sony 28mm + Fisheye Conv combo. WWL-1 had soft corners, but they affected much less of the frame. This isn't a completely fair test, the Sony fisheye behind a dome was wider, but given the choice between the two I would take WWL-1.
There are situations where a full frame fisheye lens (like Sigma 15mm or Canon 8-15) and a metabones adapter will be more appropriate than the WWL-1 combo because of its wider fov with great overall image quality.