Leica IIIb

Leica IIIb

If the Leica IIIa was all about breaking speed limits, the Leica IIIb was all about fixing a major ergonomic annoyance. On every Leica before 1938, the two eyepieces on the back of the camera (one for the rangefinder to focus, and one for the viewfinder to frame) were spaced quite far apart. Photographers had to do a literal "peephole dance," shifting their eye back and forth to get the shot.

Ernst Leitz engineers solved this with the IIIb by pushing the two optical windows right next to each other within a single raised housing on the back. While they were still technically two separate windows, you could now focus your shot, and then with a tiny micro-shift of your eye, instantly check your composition. It made street photography and portraiture noticeably faster and more fluid.

Along with the closer eyepieces, the IIIb redesigned how the diopter worked. Instead of a little lever on the eyepiece itself, the diopter adjustment for the 1.5x magnified rangefinder was moved to a neat little lever tucked right under the film rewind knob.

Under the hood, it kept everything that made the IIIa a powerhouse: the incredibly fast 1/1000s top shutter speed, the dedicated front dial for slow speeds down to 1 full second, and the gorgeous, pocketable brass body.

History

The Leica IIIb has a unique place in history because of exactly when it was made. It is the final camera of its specific bloodline.

The End of the "Built-Up" Era (1938 - 1940) Up until the IIIb, all Leica bodies were "built up" from multiple pieces of brass and metal screwed together. The IIIb was the absolute peak of this old-world manufacturing style. Shortly after its release, World War II broke out. To speed up production and make the cameras more rugged for military use, Leica completely abandoned this multi-piece design, switching to a single piece of die-cast metal for the next model (the IIIc). Because of this, the IIIb is the last of the truly "classic" pre-war bodies.

A Short, Sweet Production Run Because the war forced Leica to pivot to the IIIc so quickly, the IIIb had a relatively short production run of only about three years. This makes it significantly rarer today than the IIIa or the later IIIc.

Legacy For many collectors and shooters, the IIIb is the sweet spot. It retains the slightly smaller, slightly more elegant proportions of the early 1930s cameras, but gives you the massively upgraded viewfinder ergonomics that make it genuinely fast and fun to shoot today [1].