The Leica Summarit-M 50mm f/2.4 is a compact, lightweight aluminum-barrel M-mount normal lens, the entry point into Leica's 50mm rangefinder lineup.</parameter> <parameter name="long_description">## Leica Summarit-M 50mm f/2.4 The Summarit-M 50mm f/2.4 sits at the affordable end of Leica's 50mm M-mount range, offering the rangefinder look in a smaller, lighter, and less expensive package than the Summicron, Summilux, and Noctilux above it [1][2]. It replaced the earlier f/2.5 Summarit-M, and reviewers report that the optics carried over largely unchanged from that lens, with the main differences being the marginally faster marked aperture and a redesigned, more integrated lens hood [3]. Many photographers value it as a practical everyday normal lens, arguing that modern digital M sensors make a moderate maximum aperture far less of a limitation than it once was [1]. Optically the lens uses six elements in four groups, including high-refraction glass with anomalous partial dispersion, and it stops down with nine aperture blades for a rounded iris [2]. The barrel is built from aluminum rather than the brass used on some pricier silver Leica lenses, which keeps weight to around 190 grams and makes for one of the most compact 50mm options in the system [2][3]. Build quality is generally praised, with a smooth, well-damped focus action and a firm, positive aperture ring that resists accidental movement [1][3]. It is fully rangefinder coupled, focuses to 0.8 m, takes 46 mm filters, and mounts on M cameras; it is not factory six-bit coded [2]. The most useful identification point is the lens hood and the marked aperture. The first-generation Summarit-M was an f/2.5 lens supplied with a square, clip-on hood, while the f/2.4 version that followed it has a heavier screw-in metal hood, a difference reviewers single out as the easiest way to tell the two generations apart [3]. The f/2.4 is offered in black, with model numbers 11680 and 11682 noted for the family. --- ## Optical qualities **Rendering** The Summarit-M 50mm f/2.4 is described as a competent, modern-rendering normal lens rather than a character lens. Close-up performance shows smooth bokeh and a pleasing transition from sharp to out-of-focus areas [1]. Flare resistance is rated as good, helped by the substantial metal hood [1]. Reviewers position its overall look as closer to Leica's contemporary aspherical lenses than to older designs, while noting it gives up a stop or so of speed and a little close-focus reach to the Summicron [1]. **Bokeh and transitions** At its closest distances the lens produces a soft background and a gentle focus falloff that several users single out as one of its strengths [1]. **Flare resistance** The deep, well-made screw-in hood contributes to good control of flare and veiling glare in everyday shooting [1][3]. --- ## History **Development and Launch** The Summarit-M line was created as a more accessible tier within Leica's M lens range, giving buyers of a first M camera a 50mm option below the cost of the Summicron and faster lenses [2][3]. The 50mm f/2.4 reviewed here is the second iteration of that idea, following the original f/2.5 Summarit-M [3]. **Production Evolution** The transition from the f/2.5 to the f/2.4 brought a slightly faster marked maximum aperture and a new hood design, with the optical layout reported to be essentially carried over between the two versions [3]. The aluminum barrel construction and light weight that characterized the line were retained [2][3]. **Special editions** No widely documented factory special editions of the f/2.4 are established in the consulted sources; the lens is principally known in its standard black finish. **Collector Notes** When buying, the clearest check is to match the marked aperture and hood type to the version intended: the f/2.5 came with a square clip-on hood, while the f/2.4 uses a screw-in metal hood [3]. Because the barrel is aluminum rather than brass, it is noticeably lighter than equivalent silver Summicron or Summilux lenses, which can be a quick tactile identifier [3]. As with any used M lens, confirm smooth focus, a positive aperture ring, and clean glass, and verify that the hood and caps are present, since the integrated hood is part of the f/2.4's identity [1][3]. --- ## Sources * [1] Joeri van der Kloet. *The Leica Summarit-M 50/2.4 review*. http://joerivanderkloet.com/leica-summarit-m-502-4-review/ * [2] Camera Decision. *Leica Summarit-M 50mm F2.4 ASPH Lens Review and Specs*. https://cameradecision.com/lenses/review/Leica-Summarit-M-50mm-F2.4-ASPH * [3] Leica Lenses for Normal People. *Leica Summarit-M 50mm f/2.4 Review*. https://www.leicalensesfornormalpeople.com/2020/05/17/leica-summarit-m-50mm-f-2-4-review/

Leica Summarit-M 50mm f/2.4

M mount