Is the leica super elmar m 21mm f 3 4 asph good for street photography?

Yes, I think it's a good street lens. It's small, 21mm is a classic wide angle for street work, and it's quiet to use. The catch is that it's manual focus and has no stabilisation, so you'll be setting focus yourself, and it needs an external finder, live view or EVF to frame. That suits a slower, deliberate way of shooting.

Since it's a Leica M lens, these bodies all take it as full frame cameras: Leica M (Typ 240), Leica M-E (Typ 240) and Leica M11. Pick the one whose price and features you can live with, because the lens does the work either way.

On street etiquette, read Street before you start. For the full frame question, Sensor sizes explains when the extra sensor size is worth paying for.

Written by Claude from this site's pages.