The M.Zuikio 20mm F1.4 Pro ($799) is the first lens to bear OM System branding. If the M.Zuiko and OM of it all didn't clue you, OM System is the new name for Olympus cameras, a rebranding that comes after an imaging division spin-off. The design team hasn't lost any steps during the transition—the M.Zuiko 20mm is a good performer all around, balances well with compatible cameras, and is weather sealed. The lens faces some stiff competition from lesser-priced alternatives, however, including our Editors' Choice award-winning Sigma 16mm F1.4 DG DN Contemporary for around $450, but you may find the M.Zuiko to be worth the premium it if you love its angle of view.An Underserved Angle The M.Zuiko 20mm F1.4 Pro covers about the same view as a 40mm full-frame prime, one that makes for a roomier frame than lenses like the M.Zuiko 25mm F1.8 (50mm equivalent), but just a bit tighter than a moderate widely wide option like the M.Zuiko 17mm F1.8 (35mm equivalent). The in-between look is a go...
The OM System M.Zuiko 20mm F1.4 Pro lens is sharp and well made, with aluminum construction and weather sealing, but we wish it had a focus clutch and did a better job suppressing false color.
F1.4 optics for blurred backgrounds; Crisp, detailed images; All-weather construction with anti-smudge glass; Quick focus with no visible breathing
Visible chromatic aberration in some scenes; Omits manual focus clutch; Priced a little high