Leica Summicron 50mm f/2 IV

Leica Summicron 50mm f/2 IV

The fourth-generation Summicron-M is the most enduring of all Leica 50mm f/2 designs, having entered production in 1979 and remained in the catalogue, in evolved form, for decades [1]. Where earlier Summicrons relied on collapsible barrels, goggles, or close-focus mechanisms, this version distilled the standard lens to a compact, modern, all-metal package that established the look most photographers now associate with a Leica normal lens [2]. Its optical layout was credited to a team led by Walter Mandler with Erich Wagner and Garry Edwards, with the design dated to 1977 [1].

The lens uses a six-element, four-group formula and focuses to 0.7 m, with an aperture range from f/2 to f/16 set by a click-stopped diaphragm offering half-stop detents [1]. It is built for the Leica M bayonet with full rangefinder coupling, takes E39 screw-in filters, and accepts a built-in telescopic hood as well as separate clip-on hoods such as the 12585 and 12538 [1]. The black anodised barrel is light and short, contributing to a handling character that reviewers describe as refined and balanced on M bodies [2]. The aperture is recorded here with eight blades, though Leica technical data for the family also lists ten-blade examples across the long production run [1].

Version designation is a frequent source of confusion. Ken Rockwell classifies the 1979 to 1994 lens as the Type 4 and the 1994 to 2003 barrel as the Type 5, noting that both share the same optical formula and differ mainly in barrel construction [3]. Early production carried a distinctive focusing tab nicknamed the "Tiger Paw" or "Tiger Claw," which later gave way to a more conventional concave tab, and the tab was eventually dropped from the standard finish entirely [3]. Reported finishes across the lineage include black, chrome, and a small run of titanium, with collectors using the focus-tab style and serial ranges to separate earlier from later examples [1][3].

Optical qualities

Rendering The version IV is widely regarded among Leica's normal lenses for its combination of resolution and pleasing rendering, and it retains a strong following for both film and digital use [2][3]. Reviewers consistently treat it as a high-performing, characterful standard lens rather than a clinical one, though detailed laboratory measurements are not the focus of the collector-oriented sources surveyed here [2]. Because the Type 4 and later Type 5 share an optical formula, observations on image character generally apply to both barrels [3].

History

Development and Launch The design was finalised in the late 1970s by a Leitz team under Walter Mandler, with Erich Wagner and Garry Edwards also credited, and the lens reached the market in 1979 [1]. It replaced the previous 1969 to 1979 Summicron, itself a six-element-in-four-groups design, and carried the simplified, compact philosophy further into a modern fixed barrel [3].

Production Evolution Over its long life the lens saw barrel rather than optical changes. The focusing tab evolved from the early "Tiger Paw" style to a conventional concave tab and was later removed, while finishes spanned black, chrome, and titanium [1][3]. Later production examples were offered with six-bit coding for digital M bodies, and the lens has been sold under multiple Leica order numbers across its variants [1].

Special editions Several commemorative and regional variants are documented, including a Royal Photographic Society Centenary lens, a Dutch Flag edition, a Colombo '92 release, and a 50 Jahre Summicron anniversary edition, alongside a small titanium run [1]. A limited screw-mount edition was also produced near the end of the 1990s [1].

Collector Notes Because the standard modern barrel closely resembles current production, an older Type 4 can be mistaken for a recent lens at a glance, so buyers should verify serial number, finish, and tab style against the variant they intend to buy [3]. Order numbers recorded for the family include the black 11819 and the silver 11816, among others tied to specific finishes and editions [1]. When shopping, it is worth confirming the presence and condition of period-correct hoods such as the 12538, which trade as desirable accessories in their own right [2].

Sources

• [1] Leica Wiki (English). 50mm f/2 Summicron-M. https://wiki.l-camera-forum.com/leica-wiki.en/index.php/50mm_f/2_Summicron-M
• [2] Leica Lenses for Normal People. Leica Summicron 50mm V4 Review. https://www.leicalensesfornormalpeople.com/2021/03/10/leica-summicron-50mm-v4-review/
• [3] Johnny Martyr. Clearing the Confusion: Leica 50mm Summicron Version History. https://johnnymartyr.wordpress.com/2024/05/28/clearing-the-confusion-leica-50mm-summicron-version-history/