Keith over at Northlight Images has completed his review of the very unique Laowa 15mm f/4 1:1 Macro Shift lens.
From Northlight:
A thoroughly interesting lens.
If you're not put off by its completely manual operation, then it's capable of excellent performance as a macro and as a standard wide shift lens.
The 1:1 capability is likely to be unused by many for the sheer practical difficulty of having the focal plane only millimetres from the front element.
0.4:1 magnification increases this distance to a more workable 25mm or so.
The shift function works best with a crop sensor and allows for interesting control over background placement. I expect to see plenty of samples of small vertical objects (mushrooms/insects on twigs) with a perfectly placed soft out of focus background. Just take note that such shots will need a lot of care with camera mounting and lighting (I didn't use flash once for this article). Read the full review