Zeiss ZM 35mm f/1.4 Distagon Aperture Series: View Over Alabama Hills to Lone Pine Peak and Mt Whitney (Leica M1-R)
This series from f/1.4 through f/8 examines total imaging performance of the Zeiss ZM 35mm f/1.4 Distagon on a distance scene, which reveals lens faults mercilessly. Sharpness near-to-far and across-the-field along with field curvature, focus shift and general imaging performance.
Also, a useful discussion of just important the focus position with the frame can be to total sharpness.
Includes images from f/1.4 through f/8 at up to full resolution, plus crops.