Carl Zeiss Planar 80mm f/2.8

Rollei needed a taking lens that could resolve onto 6x6 with the contrast their reflex bodies demanded, and Zeiss built it. The Planar 80mm f/2.8 became the standard lens on the Rolleiflex 2.8F, one of the most refined fixed-lens twin-lens reflexes of its era, built from the early 1960s into the early 1980s. You could not swap it. The whole 2.8F was designed around this one focal length, ground to it and nothing else.

The Planar name tells you the formula. It is a double-Gauss, near-symmetric in layout, the design built for flat-field correction, and it resists the field curvature that softens corners on cheaper TLR optics. On the 2.8F that means edge-to-edge sharpness on a square negative that holds up when you stop down to f/8 or f/11, which is where most people who shoot one actually work. Wide open at f/2.8 the center is sharp with a gentle falloff toward the corners. The out-of-focus rendering, by most accounts, stays smooth rather than busy, which is what you want behind a face.

This is a portrait and wedding lens first, a documentary lens second. The waist-level finder and the roughly normal 80mm field made it a studio and street tool for decades before 35mm SLRs took over, and it stayed in working bags long after because the tonality off 120 film held up. People who shoot one now are usually doing portraits, environmental work, or slow deliberate black and white.

The honest weakness is flare. These single-coated Planars wash out against a backlight or a bright window edge, and contrast drops fast when the sun sits anywhere near the frame. The lens stays single coated across its run, so use the lens hood and keep the light behind you. The other catch is mechanical, not optical. These are sixty-year-old cameras, and a Planar is only as good as the shutter and the film-plane alignment behind it.

The leaf shutter sits in the lens, a Synchro-Compur, and that is the practical thing to know. It syncs flash at every speed up to its 1/500 top, so fill flash at moderate apertures works in a way no focal-plane camera can match. The flip side is the slow end. Below about 1/15 and down toward the one-second range, leaf shutters lose timing accuracy as the blades drag, so meter long exposures carefully and bracket. Set the leaf-shutter speed range in Zone Light Meter and it will keep your readings inside the band the shutter can actually hit. Today a clean 2.8F with this Planar runs into serious money, most often cross-shopped against the Hasselblad with an 80mm Planar C. People still pay it because the negative looks like nothing else.