You asked
Is the leica summilux tl 35mm f 1 4 asph good for portraits?
The Summilux-TL 35mm f/1.4 can make good portraits, but it's better at some kinds than others. On APS-C it frames like about 52mm on full frame, which is a natural, slightly wide view. That suits environmental portraits that show where someone is, and groups. For tight headshots, the portraits guide recommends a longer lens, roughly 85mm full frame or 56mm on APS-C, so you can stand further back and keep faces in proportion.
The lens is autofocus, but it isn't stabilised, so keep shutter speeds up. It mounts on L-Mount bodies, and the lens page lists the cameras it fits. If you're deciding what to buy first, the lenses guide explains where a fast standard prime fits in a kit.
Written by Claude from this site's pages.