Hasselblad / Zeiss Planar C 100mm f/3.5

The 100mm f/3.5 Planar is the technical lens of the Hasselblad standard range, the one shooters reach for when the 80mm is not quite clean enough at the edges. Zeiss built it with a flatter field and tighter aberration correction than the faster 80mm, and per Hasselblad and Zeiss's own data it out-resolves the kit normal and ranks among the highest-resolving lenses in the whole V system. The flat field is the point. A subject that sits on a plane, a document, a print, a building facade shot square, holds focus into the corners instead of softening off the way a fast normal does. That is why repro and architecture people went looking for the 100 specifically.

It is a Planar, the double-Gauss layout Zeiss has refined for decades, and on this slightly-longer-than-normal focal length it behaves well. Stopped to f/8 it is clean across the full 6x6 frame, corner to corner, with no real falloff in resolution. Wide open at f/3.5 it stays crisp in the center and lets the corners go gently soft rather than smearing. Contrast runs high in the usual Zeiss way, deep blacks and strong microcontrast, though early single-coated copies flare more against the sun than the multicoated C T* glass that followed. Keep a hood on it.

Bokeh is the compromise for that flat field. The out-of-focus rendering is smooth and unobtrusive, but it does not separate the subject the way the 150mm Sonnar does. This is a resolving lens, not a portrait dream machine. Shooters who want the longer reach and the rounder rendering often go straight to the 150 and skip the 100, then come back to it when they need a head-and-shoulders frame that stays sharp into the eyelashes.

Like every C lens it carries a Synchro-Compur leaf shutter inside the barrel, which means flash sync at every speed up to 1/500. That is the reason studio and wedding shooters loaded these for decades. With no focal-plane curtain capping you at 1/60, you can balance strobe against a bright ambient background at any shutter speed. Running fill flash outdoors with Zone Light Meter, meter the ambient for the background and let the leaf sync handle the subject independently with aperture and strobe power. The 50mm filter thread is the smaller Hasselblad bayonet size, so sort out the right adapters before you buy ND or grads for it.

On the used market the 100 usually costs a bit more than the 80mm, not less. It was made in smaller numbers and the people who understand the system hunt for it on purpose, so it carries a premium over the mass-produced kit normal. It is still far cheaper than the long leaf-shutter teles, which keeps it sane. The honest weakness on early copies is that single coating: point one into a bright sky or put a light source in the frame and you will see veiling flare and ghosts that the later C T*, CF and newer versions clean up. Track down a multicoated copy with clear glass, keep the hood on, and you have one of the sharpest lenses in the V system for far less than the fast glass costs.