By environmental portraits I mean people in their surroundings doing things. In think it's strength of the Leica rangefinder. I have just taken a series of pictures of a cafe and its owner, as well as a series of workers in a furniture factory, both to illustrate feature stories.
I like the 35 Summicron-Asph. A slightly blurred background still gives context while keeping the main focus on the subject. Hard to do when they are moving but as long as you get the right part in focus -- usually the hands -- it works well. I also tried a 50 Summicron and found it effective, but no more so than the 35, unless I wanted more out of focus areas. I think I liked a wider composition. I also tried the 24 Elmarit-Asph and was quite surprised at its effectiveness for portraits in context -- as long as the subject is not too close.
What is your experience?