Leica 50Mm Summicron Collapsible Manual Focus Only
As all M-mount lenses, it’s manual focus only. Summicron is the Leica designation for an f/2 lens, meaning that this lens has a 25mm effective aperture. This is a 50mm lens a slightly long normal.
Home / Leica / Cameras / Leica M / Leica M3 DS + Summicron 50mm f/2 Collapsible. This is a screw mount (M39) and collapsible version of the. The different versions are: Main Reference: Ken Rockwell.
The first Summicron was an evolved Summitar collapsible 50mm with Lanthanum glass, and was launched in 1953. New coating technologies available after World War II allowed for the creation of the Summicron lens. The body has a somewhat dirty appearance, would benifit from good external cleaning.The Leica 50mm f/2 Summicron lens was introduced for LeicaLeica designed a number of f/2 lenses before the Summicron, such as the Summar and Summitar.
It was produced with a telescoping lens barrel that allowed theLens to be collapsed for carrying, a popular feature of thread mount Leica lenses.By 1957 the collapsible Summicron was discontinued in favor of fixed mount 50mm f/2 Summicron-M, which had been introduced in1956. The first generation 50mm f/2's optical formula was a modifiedGauss design using seven elements in six groups the fifth group being theCemented pair. When the first Leica M-series camera, the M3, wasIntroduced in 1954, it was accompanied by the 50mm f/2 Summicron in M bayonetMount form. A rubber material which is inserted in between each externally exposed part (manual focus and zoom rings, buttons, switch panels etc.) to ensure it Thread mount cameras in 1953. For lenses with collapsible design, the length is indicated for the working (retracted) state.
Exceptionally good aberrationCorrection, minimal vignetting, high contrast and excellent center resolution became hallmarks of Leica 50mm f/2 Summicron lenses. The rigidVersion weighed 285 grams, or 10 ounces. Both the collapsible and rigidEarly Summicrons were built with chrome plated brass lens barrels.
It weighs 65 grams less than its predecessor. This fourth generation modified Gauss design uses six elements in four groups, with theSecond and third groups being cemented pairs. The lens barrel was machined from black anodized aluminum, whichIn conjunction with the reduced number of glass elements, allowed the new lensTo weigh 260 grams, 25 grams lighter than the previous version.In 1979 the 50mm f/2 Summicron-M was again updated, thisTime using computer assisted lens design, which was a technology pioneered byLeica. By taking advantage of new optical glasses, the number ofElements was reduced to six in five groups, with the second group being theCemented pair. Lightweight,Compact M-series lenses have always been a priority and the new design madeStrides in that area. The 50mm f/2 Summicron quickly became renownedFor its performance and through its successive design updates it has remained theLens by which all "standard" lenses for 35mm cameras are judged to this day.The third generation 50mm f/2 Summicron-M, introduced in 1969, remained aModified Gauss design, but included significant improvements.
Leica 50Mm Summicron Collapsible Full Frame M9
(Before you ask, I haveNot used the new 50mm f/2 APO-Summicron-M ASPH, said to be the finest standardLens ever made. However,My all time favorite is the Leica 50mm f/2 Summicron-M. I concur with Leica'sStatement that the 50mm f/2 Summicron-M delivers excellent "image quality,Speed, size, weight and price." It is a perfect balance of theseQualities, equally suitable for Leica M 35mm film cameras or the full frame M9 digital camera.Over the years, I have used and tested many fine standard lenses, including the40mm f/2 Summicron-C, 50mm f/2.8 Elmar, 50mm f/2 Summicron-R, 50mm f/2 AI Nikkor, 50mm f/1.8 AFNikkor, 50mm f/1.4 Canon FD, 55mm f/2 SMC Takunar and 58mm f/1.4 Rokkor, among others. The 50mm Summicron-M's diagonal field of view is 47-degrees. Its well-balanced designMakes this ideal standard lens an outstanding choice in terms of all criteria,Including image quality, speed, size, weight and price."I am a fan of standard focal length lenses, because theyDeliver a natural perspective for landscapes, as well as for full length pictures of people orGroups of people. Leica calls it, "A venerable standard at the top of its form." They go on to state:"The tried and well-proven optical design of this lensProvides for a perfection of picture quality extending all the way to theExtreme corners of the image field even at full aperture, as well asOutstanding contrast throughout, at all apertures, even at close distances.Stopping down to f/2.8 or f/4 brings only a minimal increase in contrast.Distortion is extremely low and practically invisible.
The front of the lens barrel is threaded to accept 39mm filters (E 39). The aperture ring has positive click stops at full and half f/stops and can be set between clicks, ifDesired. The rotation from stop to stop (0.7 meter to infinity) is onlyAbout one-third of a turn, making the lens fast to focus. The focusing helicoid is machined from brass. Its knurled aluminum focusing ringTurns very smoothly and there is a fingertip focusing lever on the underside ofThe barrel that allows one finger focusing.
There is only a modest improvement, mostly at the edges, when the lens is stopped down from f/2.0 to f/4.0, its optimum aperture, and no perceptible improvement at smaller f/stops. Vignetting is minimal, with a maximum light loss of only 5.6% at the edge of the frame. Distortion is at the vanishing point, perhaps a maximum of 0.2% and completely invisible to the human eye. Color rendition is so good that this lens has long been considered a reference against which other lenses are judged.Flare is extremely well controlled, as are all aberrations. Colors are exceptionally clean and accurate with subtle shadings.
When testing orComparing lenses it is absolutely necessary. A technical data PDF file for this lens showing MTFGraphs, distortion graphs, depth of field scales and so forth is available onNo matter how good the lens, for critically sharp photos itIs always wise to use a tripod or other steady camera support. Small picture details are clearly resolved.To summarize, the Leica 50mm f/2 Summicron-M is capable ofTaking superb quality, highly detailed photographs, providing the photographerDoes his or her part.
However, anyone can see that it takes great pictures. The 50mm f/2 Summicron-M lensIs so good that only the most technically capable photographers can explore itsFull capability. This lack of vibration, when coupledWith proper photographic technique, helps explain why Leica M cameras andLenses consistently outperform the competition.
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