Leica IIIA Summar 5cm f2 LTM L39 Screw Mount Lens (Lens Only) SN 389989
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This Leica Summar 5cm f/2 lens, serial number 389989, is a genuine Leitz Wetzlar classic designed for Leica Thread Mount (L39) rangefinder cameras. Produced in the mid-1930s, the Summar was one of Leica’s first fast lenses, offering exceptional performance for its time in a compact, collapsible design. The 5cm (50mm) focal length paired with a bright f/2 aperture makes it versatile for portraits, low-light scenes, and general photography. The lens produces the distinctive vintage Leica rendering known for its smooth falloff, gentle contrast, and unique character wide open. Focus and aperture adjustments operate smoothly, and it remains a beautiful example of early Leica optical craftsmanship.
Key Specs and Features
- Focal Length: 50mm (5cm)
- Maximum Aperture: f/2
- Mount: Leica Thread Mount (LTM/L39)
- Optical Construction: 6 elements in 4 groups
- Aperture Range: f/2 to f/12.5
- Focus Range: Approximately 1m to infinity
- Coating: Uncoated early glass, typical of pre-war production
- Collapsible lens barrel for compactness
- Serial Number: 389989 (circa mid-1930s, Leitz Wetzlar, Germany)
- Lens only, no body included
Use Cases
- Ideal for collectors of early Leica optics
- Perfect for display or historical photography setups
- Suitable for use on Leica screw-mount rangefinders or digital cameras with an adapter
- Produces distinctive vintage rendering with classic Leica character