But both the Zeiss C Biogon and the Leica Summicron-M 35mm are crisp from edge-to-edge at f/2.8, which isn't true of the Summarit. At f/4 the lens improves rather dramatically in terms of resolution.

The Carl Zeiss Biogon T* 2,8/25 ZM is a sharp wide-angle rangefinder lens. It's not perfect, but it's a solid performer and good value when compared with Leica glass.

It features 9 elements in 6 groups, a precision-engineered full-metal casing, weighs in at 340 grams, and can be de-clicked using a supplied tool for movie making. The Zeiss Loxia 35mm f/2 Biogon T* ...

The Zeiss Loxia 35mm f/2 Biogon T* is much smaller and lighter than Sony's 35mm behemoth, though, so if you can learn to love the manual-focus only nature of the lens (and we did, hook, line and ...