Olympus m zuiko 25mm f 1 8 vs yongnuo yn25mm f 1 7m?

Both are 25mm prime lenses for Micro Four Thirds. On your camera they frame like a 50mm on full frame, and both have autofocus and no stabilisation. The difference is the aperture. The Yongnuo's f/1.7 lets in a little more light than the Olympus's f/1.8, and it gives slightly shallower depth of field, about the look of f/3.4 against f/3.6.

They fit the same list of bodies, so the camera you already own won't decide it. I'd pick the Yongnuo if low light matters most to you. If you want a maker's lens for an Olympus or OM System body, the Olympus is the safer choice. Either one works well for people, food and everyday street shots. For more on the format, see Micro Four Thirds, and for a first prime in general, see Lenses.

Written by Claude from this site's pages.