Olympus M.Zuiko 12mm f/2 12mm

The Olympus 12mm f/2 is the sharpest, smallest 24mm equivalent you can put on a Micro Four Thirds camera. Buy it for astro and street, skip it if you need weather sealing or zoom flexibility.

The sharpness here is the headline. Owners consistently rave about it wide open at f/2, and it only gets better stopped down. The optical design throws two aspherical elements, one ED element, and a Super HR element at the problem, and it shows. Micro contrast is lovely, color fringing is well controlled, and the 7-blade diaphragm keeps sunstars looking decent. What surprised us most is how good this thing is for astrophotography despite being a 12mm f/2 on a smaller sensor. The manual focus clutch with Snapshot Focus mode makes zone focusing for night skies stupid easy. Autofocus is quick and quiet thanks to the MSC motor, though it's nothing special compared to modern linear motors. The 200mm minimum focus distance and 0.08x magnification mean you won't be doing close-up work, but that's not what this lens is for.

The obvious comparison is the Panasonic Leica DG Vario-Elmarit 12-35mm f/2.8. That zoom gives you flexibility and weather sealing, but it's bigger, heavier, and a full stop slower. If you need one lens to do everything, get the Panasonic. If you want the sharpest, smallest 24mm equivalent for MFT, the Olympus wins. The Sigma 18-50mm f/2.8 and Tamron 17-70mm f/2.8 are also worth a look if you're on APS-C, but they're not direct competitors on MFT. The 7Artisans 35mm f/1.8 is cheaper and faster, but it's a completely different focal length and nowhere near the optical quality.

Pricing is all over the map. In the US you'll see it anywhere from USD 393 to USD 750 across five listings, and in Europe it swings from EUR 292 to EUR 455. The best US deal we found is at the low end of that range, and honestly at USD 393 this lens is a steal. At USD 750 it's a harder sell, especially when you can get a solid zoom for less. Shop around, don't pay full retail, and you'll be happy.

The Olympus M.Zuiko 12mm f/2 is a tiny metal barrel of sharpness that punches way above its weight class. It's a 24mm equivalent prime for Micro Four Thirds, and the one thing you need to know is this: if you shoot astro, street, or landscapes on MFT and want a lens that disappears into your bag, this is the one to beat. At 130g with a bright f/2 aperture and a manual focus clutch, it's built for people who actually go outside and shoot.

If you need weather sealing, this isn't your lens. Go grab the Panasonic Leica 12-35mm f/2.8 instead. If you want a do-everything zoom, skip this and get a standard zoom. And if you're shooting portraits or want creamy bokeh, this 12mm f/2 is the wrong tool entirely, get something longer and faster.

This lens earns its reputation. It's sharp, tiny, well-built, and a joy to shoot with. The lack of weather sealing and the rough mount on some copies are annoying, but they don't ruin the experience. If you shoot Micro Four Thirds and want a wide prime that delivers, buy it. Just don't pay more than you have to.