Leica 75mm f/2 APO-Summicron-M ASPH: Aperture Series (Two Aspen in Lundy Canyon + Grassy Log Waterfall)
The Leica 75mm f/2 APO-Summicron-M ASPH design is related to the Leica 50mm f/1.4 Summilux-M ASPH in the design of its lens elements behind the diaphragm, but it offers a more uniform performance over the frame than the 50/1.4 Summilux, at least in theory. It also features a “floating” rear element for better close-focus performance, a weakness of its sibling 90/2 APO.
At about $3795 it is medium-priced as Leica M lenses go, but a real jewel in size and weight and handling. A keeper for the long term on Leica Mperhaps, and due to ray angle, most likely an excellent choice for mirrorless. And in general, I prefer the ~75mm focal length over 90mm as being more generally useful.
But how does a brand-new 75mm f/2 APO-Summicron-M ASPH fare on the Leica M240?
This particular brand-new lens developed a sticky aperture within the first 100 frames. I don’t understand the quality control.
This second aperture series is more about the juxtaposition of sharpness and blur along with moving water. Apertures f/9.5 and f/13 are included for perspective over and above f/8 and f/11.