You asked
Best wide angle lens for the olympus om d e m5?
If you want one wide angle for the OM-D E-M5, I'd pick the Olympus M.Zuiko 7-14mm f/2.8 PRO. It covers 7-14mm at f/2.8, which frames like 14-28mm on full frame. The constant aperture helps for interiors and dim scenes.
If you'd rather have one zoom for more than wide shots, the Panasonic Leica DG 8-18mm f/2.8-4 gives you 16-36mm equivalent.
For a prime, the Olympus M.Zuiko 12mm f/2 frames like 24mm. If you shoot in low light, the Panasonic Leica DG 12mm f/1.4 is the faster choice.
Fisheyes are a different look, so skip them unless you want that effect. To check any lens's field of view, use the focal length converter.
Written by Claude from this site's pages.