You asked

Best wide angle lens for the om system om 3?

For the OM-3, I'd start with the Olympus M.Zuiko 7-14mm f/2.8 PRO. It covers 14-28mm on full frame and keeps f/2.8 across the zoom, which is rare at this width. If you want something smaller, the Olympus M.Zuiko 12mm f/2 gives you a 24mm view in a compact package. For dim interiors and night scenes, the Panasonic Leica DG 12mm f/1.4 is the fast pick, since a wider aperture lets in much more light. If the f-numbers are confusing, the aperture section of the lenses guide explains them, and the focal length converter will show you any other focal length in full-frame terms.

Written by Claude from this site's pages.

From these pages