Leica Summicron 50mm f/2 II Rigid

Leica Summicron 50mm f/2 II Rigid

Known among collectors simply as the "Rigid," this chrome Summicron replaced the earlier collapsible 50mm Summicron and gave the standard fifty a solid, non-retracting barrel that has become one of the most admired classic Leica lenses [1][2]. It carried over the well-regarded seven-element design that established the Summicron name while housing it in a fixed mount built to exacting mechanical standards, a quality that reviewers often compare to fine watchmaking [3]. Sitting at the heart of the rangefinder M system during its run from 1956 to 1968, it is frequently cited as a high point of mid-century Leica lens making and remains popular with users who want a vintage-rendering 50mm on both film and digital M bodies.

Optically the lens uses a seven-element, six-group formula at a maximum aperture of f/2, with a ten-blade diaphragm that produces a notably round aperture opening and smooth out-of-focus rendering. The all-metal chrome barrel is dense for its size, focuses down to one meter, and accepts 39mm filters, the long-standing Leica standard for the period. It mounts on the M bayonet with full rangefinder coupling, and being a fixed rigid design it is straightforward to use on modern M cameras; many examples have been six-bit coded so digital bodies can recognize the lens. Handling is defined by a precise, well-damped focusing helicoid and a positive aperture ring, traits regularly singled out in reviews of surviving examples.

The Rigid is closely related to its sibling, the Dual Range Summicron (DR), which shares the same optical core but adds a removable near-focus attachment and spectacles for close work; the two are often discussed together because of their common heritage. Within Leica's catalogue the lens appears under several model and code references, including the numbers 11018, 11117, 11118 and 11818 and the older code words SOSIC and SOSTA, reflecting changes across its long production. It was produced in chrome finish, which is part of its visual signature and a point buyers use to distinguish it from later black versions of the 50mm Summicron line.

Optical qualities

Rendering Documented accounts describe a lens that balances good resolution with a gentle, classic drawing style rather than the high-contrast clinical look of later designs[4]. Reviewers commonly note pleasing, smooth out-of-focus areas helped by the rounded ten-blade aperture, and a rendering that many describe as characterful and well suited to portraiture and everyday photography. Contrast is moderate by modern standards and tends to build as the lens is stopped down, a behavior consistent with its 1950s coatings and design era. Specific, repeatable claims about flare, distortion and vignetting vary between individual samples and are not consistently documented enough to summarize with confidence, so they are best assessed on the actual copy in hand.

History

Development and Launch The Rigid Summicron arrived in 1956 as a fixed-barrel successor to the collapsible 50mm Summicron, retaining the established seven-element optical concept while moving to a more robust mount. It was produced through 1968, spanning much of the classic M era, and is regularly described as one of the standout standard lenses of that period.

Production Evolution Over its run the lens was catalogued under multiple model numbers and code words, including 11018, 11117, 11118, 11818, SOSIC and SOSTA, reflecting incremental updates and cataloguing changes rather than a wholesale redesign. The optical core remained the seven-element, six-group fifty throughout, and the lens was offered in chrome.

Special editions No widely documented factory special or military variants of the chrome Rigid are commonly cited; the most significant related variant is the Dual Range Summicron, which shares the optics but adds a close-focus range with detachable spectacles. Buyers researching the family should be aware that the Rigid and the DR are distinct models often confused for one another.

Collector Notes Because the Rigid and Dual Range versions share an optical formula, confirming which model is in hand, and whether close-focus accessories are present and matched, is a key check before purchase. As with most lenses of this age, internal haze and cleaning marks affect value and rendering, and the precise focus feel that defines a good example can be compromised by old or stiff lubricant. Verifying the model and code markings, the chrome finish, the 39mm filter thread, and whether the lens has been six-bit coded for digital use are all worthwhile steps; matching period caps, hoods and filters add to collectibility.