Sony FE 12-24mm f/4 G
The about $1699 Sony 12-24mm f/4G is here. It’s quite modest in size for its 12-24mm range, and the tradeoff appears to be distortion, but that issue seems to be worst at the 12mm end.
These aperture series evaluate image sharpness from f/4 through f/8, along with distortion and color shading and lens symmetry.
Sony 12-24mm f/4G Aperture Series @ 17mm: Mosaic
Sony 12-24mm f/4G Aperture Series @ 24mm: Mosaic
Includes images up to full resolution at f/4, f/6.3, f/8.
The middle and long end of the zoom range looks stronger than the 12mm end of the zoom range.
f6.3 @ 1/5 sec, ISO 100; 2017-07-10 20:34:34[low-res image for bot]
Sony A7R II + Sony FE 12-24mm f/4 G @ 24mm