This aperture series evaluates the Panasonic Lumix S PRO 50mm f/1.4 on a far distance scene, looking for lens skew, focus shift, field curvature, and correction for lateral chromatic aberration, and control of secondary color. The Panasonic 50/1.4 relies on distortion correction, so sharpness at the edges is of particular interest. This series reveals a lot.
Because the sharpness warrants it, the images are presented at sizes up to 143 megapixels. All images are downsampled variants from the 187 megapixel Multi-Shot High-Res mode images.
This is a very detailed study. In diglloyd L-Mount Mirrorless:
Includes images at 47 and 143 megapixels, plus crops.