Pentax SMC Pentax 67 90mm f/2.8

Pick up a Pentax 67 and odds are the 90mm is already mounted, because it is the lens the system was balanced around. A person standing in their own room, shot wide open at f/2.8 on a 6x7 negative, with the face sharp and the wall behind them going soft and quiet in a way a 35mm normal lens cannot reach. A lot of that comes from the negative itself, not just the glass. A 90mm covering 6x7 frames about like a 45mm on full frame, a touch wider than normal, so you keep the subject and enough of the surroundings to read where they are. Fast aperture, large frame, slightly generous angle: that is the combination people come to the 67 for in the first place.

The rendering is classic SMC Pentax 67. Wide open it is genuinely soft toward the corners and a little glowy on hard contrast edges, which on skin tends to flatter rather than annoy. Stop down to f/5.6 or f/8 and it tightens into the biting, high-resolution sharpness the Super Multi Coating optics are known for, with deep blacks and clean color. The out-of-focus areas are smooth and neutral, no nervous edges, no swirl, which is most of why portrait shooters keep it on the body. The SMC coatings hold flare down well for a lens of this vintage, though aim it at a bare bulb and you will still pull some veiling.

The crowd is fashion and editorial, plus a long run of fine art photographers who wanted medium format that handled like an oversized SLR instead of a Hasselblad. The body is heavy and the mirror slaps hard, and the 90mm is the lens that makes it feel like a camera you can actually hand hold and work fast with.

The honest weakness on the standard 90mm is mechanical, not optical. The Pentax 67 runs a focal-plane shutter, so this non-LS lens is stuck with the body's flash sync of roughly 1/30 of a second, which is rough for fill flash in daylight. Pentax also offered a way around it: there is a leaf-shutter 90mm f/2.8 LS, same 67mm filter thread, that syncs up to 1/500 and is the usual choice when you need flash against bright sun. If you are shooting the plain version, that ceiling is just a limit you plan around.

Today the standard 90mm f/2.8 is one of the cheaper ways into medium format glass, costing a fraction of a Hasselblad normal while losing little optically. People cross-shop it against the Mamiya RB/RZ 90mm and the Pentax 105mm f/2.4, the system's cult portrait piece; the 90mm wins on speed and price, the 105 wins on that specific dreamy signature. Metering it is straightforward. At f/2.8 in a dim interior, read off the face rather than the bright window behind it, and let Zone Light Meter place that skin tone on the zone you want. The 67mm thread takes standard screw-in ND and grads if you need to drag the shutter for ambient.