You asked
What cameras fit the yongnuo yn25mm f 1 7m?
The Yongnuo YN25mm f/1.7M is a Micro Four Thirds lens, so it fits any Micro Four Thirds body. The lens page lists more than forty of them, from Olympus and OM System to Panasonic Lumix. For a small, everyday pairing, I'd start with the OM System OM-5 for its size, or the OM System OM-1 if you want the most capable body. The Panasonic Lumix G100 is another easy choice for a light setup.
On Micro Four Thirds the lens frames like a 50mm on full frame, and f/1.7 gives about the depth of field of f/3.4. It's a good all-round portrait and street focal length. Check the full list on the lens page before you buy.
Written by Claude from this site's pages.