Get Leica 75mm f/2.4 Summarit-M at B&H Photo
The Leica 75mm f/2.4 Summarit-M at about $2150 has an “industrial design that offers improved optical performance” over its f/2.5 predecessor, though the details are left unclear and the optical formula is apparently unchanged.
What is left unsaid is that it might be a better lens than its Leica 75mm f/2 APO-Summicron-M ASPH sibling.
In Guide to Leica:
This f 2.4, 2.8, 4, 5.6, 8, 11, 16 aperture series is presented with up to full-resolution (5976) images in order to show just how strong a performer the lens is. But it does have one disappointing weakness that was also observed in the Mining Camp Bunkhouse series.
Discussion includes sharpness, flare and distortion.