By Ked · May 2026
May 2026
The traditional argument for spending nearly twice as much on a Summilux (f/1.4) compared to a Summicron (f/2) at the same focal length was simple: low-light shooting. One full stop of additional light gathered means a shutter speed twice as fast at the same ISO, or one stop lower ISO at the same shutter speed. In 1980, in 1990, and even in 2005, that one stop made the difference between a usable hand-held photograph and a blurred one, or between a clean file and a noisy one. The Summilux earned its premium because the camera's sensor or film couldn't keep up.
In 2026, this argument is much weaker. A current Leica M11 shoots clean files at ISO 6400 and recoverable files at ISO 12800. Even older M10 bodies hold up well to ISO 3200. If your problem is "I don't have enough light," the modern answer is to raise the ISO, not to spend $4,500 on a faster lens. The Summicron at f/2 and ISO 6400 produces files indistinguishable from the Summilux at f/1.4 and ISO 3200 for most shooting situations. The technology has caught up.
So why does Leica still make Summilux lenses? Why do experienced shooters still buy them? Why do the used prices stay firm?
Because the f/1.4 stop is not, and never primarily was, about gathering light. It's about two other things, and once you understand those, the price premium starts to make sense.
The most direct difference between a Summicron at f/2 and a Summilux at f/1.4 is not light. It's how much of the scene is in focus.
At a 6-foot working distance with a 50mm lens, f/2 gives you about 4 inches of depth of field. f/1.4 cuts that to about 2.5 inches. The difference is the difference between a portrait where the subject's eyes and ears are both in focus and a portrait where only the eyes are sharp and everything else, including the ears, melts into out-of-focus rendering.
For some photographers this is irrelevant. If you shoot at f/5.6 by default (landscape, documentary, group portraits), depth of field at f/1.4 vs f/2 is academic. You're never opening that wide.
For photographers who shoot wide open on purpose (single-subject portraiture, intimate work, photographs where the subject is meant to feel surrounded by a soft world), the difference matters every frame. The Summilux at f/1.4 produces a specific look that the Summicron at f/2 cannot quite reach. You can stop the Summilux down to f/2 and get the Summicron's look. You cannot open the Summicron up to f/1.4 and get the Summilux's. The wider maximum aperture is a tool that exists only on the faster lens.
This is the squishy one, and it's where the marketing copy gets fluttery. But it's also where many shooters quietly justify the premium to themselves.
Leica's fast lenses have a specific way of drawing the world that's distinct from their slower counterparts. The Summilux 50mm ASPH renders out-of-focus areas with a particular smooth, three-dimensional separation between subject and background. The Summilux 35mm ASPH has a different out-of-focus character that some photographers describe as "creamy" or "painterly." Those are overcooked words, but they point at something real. The current APO-Summicron-M 50mm (itself an f/2 lens) was Leica's answer for shooters who wanted the highest possible resolving power without the f/1.4 rendering. The fact that Leica makes both a Summilux 50mm and an APO-Summicron 50mm at top-tier prices tells you the company believes the rendering character of each is worth its own segment.
The Summicron, by contrast, is designed as the all-purpose lens: high optical quality across the aperture range, no signature look that dominates the image. If you don't want your lens to leave a fingerprint on the photograph, the Summicron is the right tool. If you do, if you want a specific quality of light, separation, and atmosphere, the Summilux is what you pay for.
This is not snobbery and it's not measurable on a test chart. It's the same reason different cinematographers pick different anamorphic lenses for the same focal length. The image has a quality beyond resolution and contrast, and that quality is what the Summilux premium is partly buying.
If the f/1.4 argument is partly about character and depth of field, the f/0.95 Noctilux argument is even more so. The current Noctilux-M 50mm f/0.95 ASPH is a $13,000+ lens that gathers about a full stop more light than a Summilux. Almost nobody who buys one is buying it primarily for the light. They're buying it for the depth of field (extreme subject isolation, an inch of in-focus area at three-foot distance) and the specific Noctilux rendering character. The lens exists as a luxury aesthetic tool, not a low-light workhorse.
As of May 2026 we track 198 active Noctilux-M listings that typically ask around $7,974. These prices reflect a small market of buyers who have specifically decided the f/0.95 look is worth the cost. The Noctilux is not a lens you reach for instead of a Summilux; it's a lens you reach for when you specifically want what only it can do.
Yes, fast Summilux lenses are still relevant in the high-ISO era, but for different reasons than they were thirty years ago.
If your case for a Summilux is "I need more light," the modern answer is to use a higher ISO and pocket the price difference. The Summicron at f/2 is the rational choice for most modern shooting, and the Summicron 35mm and 50mm are arguably better-balanced lenses than their faster siblings for the way most people actually shoot.
If your case for a Summilux is "I want a specific depth-of-field look I can't get from f/2, and I'm willing to pay for the lens's rendering character," then the premium is real and worth it. The Summilux at f/1.4 does something the Summicron can never do, and Leica's modern Summilux designs (the 35mm FLE, the 50mm ASPH, the 28mm ASPH) are among the optical high points of the M lineup.
As of May 2026 we track 354 active Summilux-M 35mm listings that typically ask around $4,356, and 358 active Summilux-M 50mm listings that typically ask around $3,414. The 35mm Summilux trades at a meaningful premium over the 50mm, partly because the current 35mm Summilux ASPH design is more recent and partly because demand for fast 35mm primes is exceptionally strong. Both lenses are roughly 50-100% more expensive than their Summicron counterparts.
The decision isn't whether fast lenses are obsolete. It's whether you specifically want what fast lenses do, and whether you'll actually shoot wide open enough to need it.
Browse current Summilux and Summicron M-mount listings on UsedLensTracker side by side to compare prices and conditions before committing to one over the other.