Leica Leitz 5cm F/2 Summitar Collapsible L39 Screw Mount Lens SN 782416
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This Leica Leitz 5cm f/2 Summitar is a classic collapsible lens designed for Leica Thread Mount (L39) rangefinder cameras. Bearing serial number 782416, it dates from the late 1940s and represents one of Leitz Wetzlar’s finest examples of precision optical engineering from the postwar era. The Summitar features a seven-element design that produces sharp, detailed images with a signature Leica rendering—smooth tonal transitions, excellent contrast, and pleasing background blur. The collapsible barrel design makes it compact and portable, ideal for use with vintage Leica bodies such as the III series. The aperture ring and focusing movement operate smoothly, and the glass remains clear for its age, showing only minor signs of use consistent with careful handling.
Key Specs and Features
- Focal Length: 50mm (5cm)
- Maximum Aperture: f/2
- Mount: Leica Thread Mount (L39)
- Optical Construction: 7 elements in 4 groups
- Focus Range: Approximately 1m to infinity
- Collapsible lens barrel for compact storage
- Aperture Range: f/2 to f/16
- Coating: Single-coated optics typical of late 1940s production
- Serial Number: 782416 (Leitz Wetzlar, Germany)
- Smooth focusing and aperture operation
Use Cases
- Ideal for collectors of classic Leica lenses
- Excellent for vintage Leica rangefinder photography
- Produces distinctive vintage rendering with characterful bokeh
- Suitable for both display and practical use with film or digital adapters