Leica Summicron-M 35mm f/2 (v3)

This is the third version of the 35mm Summicron, the six-element design that Leica built from 1979 to the late 1990s. It renders out-of-focus areas with a classic, lower-contrast smoothness the sharper aspherical lens that replaced it never quite matched. That reputation is the whole reason a clean copy still costs more than newer 35mm Summicrons that resolve more lines per millimeter. People buy this lens for how it draws, not for chart performance.

Wide open at f/2 it is soft in the corners and a little glowy, with a gentle drop in contrast that flatters skin and turns streetlights into soft orbs. The center is plenty sharp for the work it does. Stop down to f/4 and f/5.6 and it tightens into a properly crisp lens, though the signature is really what happens at the edges of focus. The transition from sharp to blurred is gradual and unbusy. No harsh outlining, no nervous double-line bokeh. Backgrounds melt. That falloff is exactly why documentary and street shooters who work close in available light keep reaching for it.

The trade-off is flare and veiling glare. This is a pre-aspherical Leica formula with older coatings, and shooting into a bright window or a backlit subject will wash contrast across the frame. Some shooters chase that look on purpose for a warmer, lower-contrast negative. If you want bulletproof contrast against the light, the 35mm Summicron ASPH that came after it is the more obedient tool. You give up some of the bokeh magic to get it, which has been the argument ever since the ASPH replaced it in the late 1990s.

It takes a 39mm filter, the standard Leica thread, so a screw-in ND or a yellow filter for black and white is easy to fit. Worth remembering that the older coatings make a good lens hood more than cosmetic here. On the Zone Light Meter side, lean on metering wide open. This is a fast 35 meant for low light, and the app will hold a clean reading at f/2 in a dim bar or an evening street where a slower lens would leave you guessing. Meter for the shadows you care about and let the highlights glow.

Today it sits in the same conversation as the 35mm Summilux pre-ASPH for shooters who want vintage Leica character without paying Summilux money, and it holds its own in the rendering argument against both its own ASPH successor and most modern 35s. The honest catch beyond flare is sample variation and decades of wear. Separation and haze turn up in lenses this old, so buy on glass condition, not just the box. A clean six-element v3 is one of the great 35mm rendering lenses ever built for the M system, and the price reflects that the secret is long out.