Olympus Zuiko Shift 24mm f/3.5

Shift up about 10mm and the spire that was leaning back into your frame stands straight. That is the entire point of the Zuiko Shift 24mm. It moves the optical axis off-center, rise or fall, so you keep the film plane vertical and still fit a tall building without converging verticals. Olympus put it forward as the first super-wide shift lens for the 35mm format, and the claim holds up: at full shift it reaches a maximum picture angle of roughly 100 degrees, wider than any tilt-shift wide that came before it.

The optical layout is 12 elements in 10 groups with an inner-focus design, so the front does not extend as you focus. The front group uses special low-dispersion, low-distortion glass, which matters because a shift lens spends its life pulling image from the edge of an oversized circle where distortion and color error want to creep in. Stopped to f/8 or f/11, where you will live for architecture and interiors, it is crisp across the field and holds its corners even at full shift. Wide open at f/3.5 the extreme corners soften and high-contrast edges pick up a little fringing, but f/3.5 is a focusing aperture on a lens like this, not a shooting one.

There is no front filter thread, and the reason is its best trick: a click-stopped rotating filter turret built into the barrel. You dial between Neutral, Y48 yellow, O56 orange, and R60 red without ever touching the front element. Those are black-and-white contrast filters, which tells you who Olympus built this for. Darken a bright sky behind a building with the orange or red, keep the film plane square, and you have done in one lens what used to mean a view camera and a bag of gels.

The diaphragm does not stay coupled through the shift movement, so you work in steps: focus, set aperture, then stop down and shift, one frame at a time. Architectural and real-estate shooters who could not haul a 4x5 into the field reached for it, along with landscape photographers who wanted horizon control without cropping away half the negative. The OM system was always the compact, travel-light SLR kit, and this lens let a small body do view-camera work.

The honest weakness is vignetting at the extremes of shift. Push the rise to its limit at a wide aperture and the corner you just lifted goes dim, because you are drawing light from the very edge of the image circle. Stop down and it cleans up, but maximum correction and maximum aperture do not coexist.

Today it trades as a specialist piece, scarcer and pricier than ordinary OM primes. People cross-shop it against the PC-Nikkor 28mm and the later Canon TS-E line. One metering note: shifting tilts the light reaching the focusing screen, so the screen image goes dark and a TTL reading taken while shifted will push you toward overexposure. Meter the scene in Zone Light Meter at zero shift, or take an incident reading, lock that manual exposure, then apply your rise or fall and shoot. Do not re-meter through the lens once it is shifted.