Leica · Rangefinder · Leica M
Leica M4
Purists will tell you the M4 is the last real Leica, and they are not entirely wrong. It has no meter, no battery, no electronics of any kind. Wind it, focus it, shoot it, and it will still do that a century from now if you keep the seals fresh. Leica built it from 1967 to 1975, right at the moment the company was sweating over Japanese SLRs eating the market, and the M4 was their answer: not more automation, but the most refined version of the manual rangefinder they already knew how to make.
The finger trap on every earlier M was loading film. The M4 fixed it. Leica swapped the old removable take-up spool for a fixed three-prong tulip that grabs the leader the instant you drop the cassette in, and they replaced the slow knob rewind with the angled crank that every later M inherited. You can reload this thing in a doorway in ten seconds. The viewfinder carries bright lines for four focal lengths, switching automatically with the lens you mount, and they come up two at a time rather than all at once: 35 paired with 135, and 50 paired with 90. The rangefinder patch is bright and high contrast, a hard-edged rectangle you bring into register rather than a split you guess at. Focusing in dim light is genuinely easier here than through most SLR ground glass.
The shutter is cloth, horizontal travel, one full second down to about 1/1000, and it is quiet. Not silent, but a soft cloth whisper instead of an SLR's mirror clack, which is the whole reason photographers carry these into quiet rooms and crowds that would notice anything louder. Flash sync sits at 1/50, so the M4 is a daylight and available-light camera first and a flash camera reluctantly. The body is brass under the chrome, heavy for its size, and it warms in your hand on a cold day. People shoot it for street and reportage and documentary work, the same way they did when it was new, and today it carries a cult reputation as the connoisseur's M, often priced above the metered M6 precisely because it has nothing to fail.
That nothing-to-fail is also the catch. There is no meter. You are the meter, or your phone is, and on a bright street with a black coat against a white wall the old sunny-sixteen guess will betray your shadows. This is where the Zone Light Meter app earns its place. An incident or spot reading lets you place exposure exactly, putting the shadow where you want it on the zone scale, which is the meter the M4 was never born with. Take the reading, set the dials, and the mechanics carry you the rest of the way, the same whether the battery exists or not.
The honest weakness, beyond the missing meter, is the cost of keeping one right. A proper CLA on an M4 runs real money, rangefinders drift out of vertical alignment over decades, and a tired one will focus slightly off without telling you. Buy from someone who has serviced it, or budget for the bench time. Do that, and you have a camera that rewards a slow, deliberate hand, and works the way it did the day it left Wetzlar.
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 1/50. Above that the app's exposure pairs still hold for available-light work.