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. One might say that the f/2.4 version is a “tweaked” design.
This scene is at distance, and shows that the 75/2.4 can deliver very high quality results, with a twist. In Guide to Leica:
This f 2.4, 2.8, 4, 5.6, 8, 11, 13 aperture series is presented in color and black and white along with large crops.
Discussion includes all aspects of lens performance, including and especially flare control.