Zeiss Loxia 35mm f/2 Biogon Aperture Series: Mosaic (Sony A7R IV)
This series from f/2 through f/8 evaluates the diminutive Zeiss Loxia 35mm f/2 Biogon 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.
The Loxia 35/2 is a rangefinder design adapted (tweaked by Zeiss) for mirrorless use. It is not a high performer wide open, but its intrinsically superb optical design can shine when stopped down, so how does it do on the 60MP Sony A7R IV?
Zeiss Loxia 35mm f/2 Biogon Aperture Series: Mosaic (Sony A7R IV)
Includes images up to full camera resolution of 60 megapixels.