Vintage Leica Summarit 50mm f/1.5 in L39 (mislabelled Zeiss), fast pre-Summilux lens with luminous rendering.
The Leica Summarit 50mm f/1.5 (L39) is a fast vintage standard prime for the Leica Thread Mount (LTM/M39), produced 1949-1960. The f/1.5 Summarit was a very fast design for its era. Note: canonical name has erroneous 'Zeiss' prefix. Leica Thread Mount.
f/1.5 maximum aperture. 50mm focal length (full-frame standard prime). Summarit vintage formula (1949-1960). LTM (Leica Thread Mount, M39 screw). Leica Thread Mount.
The Summarit 50mm f/1.5 is a fast vintage LTM prime with character rendering at f/1.5 — vintage bokeh and softness wide open that is sought by photographers drawn to vintage rendering aesthetics. Produced during the post-war Leitz production era.
On the used market the Leica Summarit 50mm f/1.5 L39 is a collectible vintage fast LTM prime. Condition checks: front element (haze common on vintage fast lenses), LTM thread. Leica Thread Mount (M39/LTM).