You asked
Best camera for the panasonic leica dg 15mm f 1 7?
The 15mm f/1.7 is a Micro Four Thirds lens, so any camera in its full list of compatible bodies will take it. The choice comes down to what else you need from the body.
For a compact, everyday setup, I'd start with the OM System OM-5 Mark II. If you want the most serious body in the Micro Four Thirds line, look at the OM System OM-1 Mark II. The Panasonic Lumix G95 is a solid alternative if you prefer Panasonic's handling.
On the lens itself, 15mm on Micro Four Thirds frames like 30mm on full frame, and f/1.7 gives about the depth of field of f/3.4. That's a good wide-normal walkabout focal length. For the sensor background, see sensor sizes, and for how aperture translates between formats, see the focal length converter.
Written by Claude from this site's pages.