Leica · Rangefinder · M39
Leica IIIb
Drop one in a coat pocket, walk a city at dusk, and you forget you are carrying a camera at all. The IIIb is a Barnack Leica, the small chrome brick from before the M came along. It rides in a jacket. It draws no looks. The shutter releases with a soft cloth-curtain whisper, barely a click, which is exactly why people who shoot strangers on the street still hunt these down eighty years later.
Using one is a deliberate act. There are two round eyepieces side by side, one for focusing and one for framing, and the IIIb moved the focusing and framing eyepieces noticeably closer together than the IIIa, so your eye travels less between them. The rangefinder patch is small and high magnification, so focus is precise once you find it, slow until you do. You set shutter speed on two dials, a fast one on top and a slow-speeds dial on the front. Everyone fumbles the two-dial split at first, then stops thinking about it. Speeds run from a full second up to about 1/1000. No meter anywhere on the body. None was ever fitted.
Loading is the part nobody warms to. You pull the baseplate off and feed the film up through a narrow slot from the bottom, and if the leader is not trimmed long the way Leitz intended, it jams or misses the sprockets. Photographers used to carry little scissors for exactly this. It is a fussy ritual, and a roll changed in a hurry is a roll changed wrong.
The mount is the 39mm screw thread, the same one that anchored Leica's whole pre-war system and every Soviet and Canon copy that followed. That thread is why the IIIb still makes sense today. Collapsible Elmars, fast Summitars, a century of glass, all of it threads right on. The body is brass under chrome and assembled to watchmaker tolerances, and that is the catch as much as the charm. A IIIb that has sat in a drawer since the war almost certainly needs a service, the slow speeds gummed and the curtains stiff, and a proper CLA on one of these is not cheap.
Since there is no meter and never was, an incident or spot reading off the Zone Light Meter app is simply how you place exposure. It is the meter the body was born without. Set the app to the film you loaded, read the light, and dial the two shutter dials and the aperture by hand. That is the whole exposure loop on a IIIb, and it is faster than it sounds once you stop thinking about it.
People cross-shop the IIIb against the later IIIc and IIIf, and against the screwmount Canons that cost less. It sits in the affordable end of the collectible Leicas, a real shooter rather than a shelf piece. Buy one because you want one of the quietest and most pocketable fully mechanical cameras going, and because you like the idea of carrying something that still works perfectly long after the workshop that built it closed.
How the app handles this body
- Metering: Take an incident or spot reading in the app and place your shadows on a chosen zone, then dial that exposure in. On a body with no meter, or one whose cell has drifted with age, the app is the meter you trust.
- Flash sync: Focal-plane shutter, so flash sync tops out around the body X-sync speed. Above that the app's exposure pairs still hold for available-light work.