Sony FE 12-24mm f/4 G Aperture Series: Mosaic (Sony A7R IV)
This series from f/2 through f/8 evaluates the diminutive Sony FE 12-24mm f/4 G on an extremely demanding subject that makes mincemeat of most lenses, mercilessly revealing every weakness, lack of symmetry, etc. Most lenses require f/5.6 or f/8 to sharpen the whole mosaic.
Sony FE 12-24mm f/4 G Aperture Series @ 12mm: Mosaic (Sony A7R IV)
Includes images up to full camera resolution of 60 megapixels.
Well, a 60MP sensor is a serious challenge that some lenses don’t meet.