Om system m zuiko 12 40mm f 2 8 pro ii vs yongnuo yn12 35mm f 2 8 4m?

Both are zooms for Micro Four Thirds, and they cover similar ground. I'd pick the OM System M.Zuiko 12-40mm f/2.8 PRO II. It holds f/2.8 across the whole zoom, so low light and shallow depth of field don't fall away as you zoom in. It also reaches a little further, framing like a 24-80mm on full frame.

The Yongnuo YN12-35mm f/2.8-4M gets darker as you zoom, dropping to f/4 at the long end. It frames like a 24-70mm on full frame. Neither is stabilised, both autofocus, and both fit almost the same bodies, so the choice really comes down to aperture and reach.

If the crop factor is new to you, the sensor sizes page explains why these numbers differ from the lens markings.

Written by Claude from this site's pages.