Why Photographers Love It
At f/1.2, this lens produces an almost otherworldly shallow depth of field and dreamy, glowing rendering that few vintage lenses can match. It's a favorite for night photography, available-light concerts, and portraits where subject isolation is the whole point. Beyond the optics, it's simply rare, Olympus made comparatively few of them, and that scarcity has made it something of a grail lens for OM shooters and collectors alike.
Optical Performance
Wide open at f/1.2, expect heavy softness, strong vignetting, and visible spherical aberration, this is a lens defined by its character, not clinical sharpness. Stopping down to f/2 tightens things up substantially, and by f/2.8-f/4 it becomes genuinely sharp with pleasing contrast. Bokeh wide open is soft and swirly, with noticeable color fringing on high-contrast edges that many photographers consider part of its charm.
Build Quality & Handling
Larger and heavier than the other 50-ish mm Zuiko primes, the 55mm f/1.2 still carries the same all-metal OM build quality: a smooth, well-damped focus throw and a positive-click aperture ring. Its extra size comes from the larger front element needed for f/1.2, but it remains well balanced on OM-1 and OM-2 bodies. Given its age and demand, copies in genuinely clean optical condition are harder to find than with more common Zuiko primes.
Buying a Used Olympus Zuiko 55mm f/1.2
This is the most expensive standard Zuiko prime on the used market by a wide margin, so budget accordingly. Inspect carefully for haze, fungus, and separation given the lens's complex 8-element design, and check the aperture blades for oil contamination. Because of its collector status, prices vary widely by condition, a hazy copy isn't a bargain if it can't deliver the rendering this lens is known for.
Frequently Asked Questions
For photographers who specifically want its extreme low-light speed and unique wide-open rendering, yes, it delivers a look the f/1.4 and f/1.8 can't match. For general use, the f/1.4 offers most of the benefit for far less money.
The f/1.2 gathers noticeably more light and has an even shallower depth of field, but it's larger, heavier, rarer, and significantly more expensive.
Yes, with an OM-to-mirrorless adapter. It's fully manual, so aperture and focus are set by hand.
55mm, larger than the 49mm thread shared by most other compact Zuiko primes.
No, it's intentionally soft and glowing at f/1.2, sharpening up considerably by f/2.8-f/4.
Look closely for haze, fungus, and element separation, and check aperture blade oil, given the price premium, optical condition matters more here than on cheaper Zuiko primes.