<p>I am flexible enough to take either 35 or 50 as standard lens for full frame. When I started Leica with M6, I acquired an 35, and the lens stays with M6 99% of time. When I got an M9, I decided to go with 50mm lens, and later on obtained an 28mm coupled with 50 from architecture and landscape to general purpose, such as street and travel. 28 is wide enough for me because I do not do much interior. 75 or longer requires extra efforts for focus so my combination is 28-35-50.</p>