You asked
What is the ttartisan m 28mm f 5 6 good for?
The TTArtisan M 28mm f/5.6 is a tiny, manual-focus prime for full frame Leica M bodies. It's a pancake, only about 19mm thick, so it disappears in a coat pocket. That makes it a natural fit for zone-focused street photography: set your distance once, and you can shoot quickly without waiting for autofocus.
The 28mm focal length is wide and immersive, so you'll need to get close to people, which is part of the appeal. If you'd like a little more distance, the Street guide walks through 28mm, 35mm and 50mm and what each one asks of you.
It's made for Leica M cameras, so check that your body is one of the Leica M bodies it fits before buying. For more on how apertures affect low light and background blur, see the Lenses guide.
Written by Claude from this site's pages.