Pentax SMC Pentax 67 55mm f/4

This is the wide-angle that talked a generation of landscape shooters into hauling a Pentax 67 up a mountain. On the 6x7 frame, 55mm gives you roughly the angle of a 27mm or 28mm on 35mm film, so it is a moderate wide, not a dramatic one. That is exactly why it gets used the way it does. Wide enough to open up a valley, long enough that you are not fighting distortion at the edges of every frame.

Stopped down to f/8 or f/11 it is genuinely excellent across the whole 6x7 negative, which is the only place that matters when you are projecting a landscape print. Corner-to-corner sharpness, clean micro-contrast, the kind of resolution that survives a drum scan and a four-foot enlargement. The SMC (Super Multi Coating) is the quiet reason this thing handles bright skies and backlight better than its age suggests. Flare is well controlled for a lens designed in the mid-eighties, and color rendering stays neutral and even, the kind of base a slide film like Velvia or Provia can build on without surprises.

Open it up to f/4 and the character changes. There is visible field curvature, so a flat subject like a building facade or a horizon line will not stay crisp from center to edge at full aperture. The corners soften and the plane of focus bows toward you. This is not a portrait lens and was never meant to be one, so the shallow-depth look is rarely the point, but when you do throw a background out of focus the rendering tends to stay quiet rather than busy. The honest weakness is just that f/4 lives more as a focusing aid than a working aperture for critical landscape work. You buy this lens to shoot it stopped down.

The big retrofocus front element takes 77mm filters, which several other 67 lenses also use, so a polarizer or a graduated ND you already own may well fit. That filter ring is doing real work on this system. Skies on 6x7 are huge, and the difference between a metered sky and a metered foreground is often several stops. If you are stacking a hard grad to hold a sunset, meter the foreground and the sky separately in Zone Light Meter and let the zones tell you how dense a grad you actually need, rather than guessing and burning a 70-dollar sheet of 120.

Today it trades used for a fraction of what a comparable Hasselblad or Mamiya wide costs, which is the whole pitch for the Pentax 67 system in the first place. The closest wide-angle rivals are the Mamiya RZ 50mm and the Hasselblad 50mm Distagon, though both sit a touch wider on their respective formats, so this is really a comparison of system cost rather than a like-for-like swap. The Pentax body has no leaf shutter, so flash sync is slow, but landscape shooters on a tripod at f/16 never cared about that. People still buy this lens because it does one job, sharp wide-angle on a giant negative, and does it for the price of a nice dinner.