Conclusion

The Leica 75mm Summarit (f/2.5) is capable of rendering with impressive sharpness and very pleasing bokeh.  It’s perhaps too sharp for some types of portraiture and its bokeh may be marginally less smooth as compared to some of Leica’s finest   A major shortcoming is its minimum focus limit of 0.9 m.  The only other limitation is its maximum f/2.5 aperture, which is only a problem if you require wider apertures — in which case, you shouldn’t be looking at an f/2.5 lens.  In the final analysis, however, the 75mm Summarit is an excellent optic in a small package that, in most applications, simply excels……

Source: photographsbypeter.com

Leica 75mm Summarit f/2.5 Peter Prosophos reviews