Leica Summicron-M 50mm f/2.0
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The tried and well-proven optical design of this lens provides for a perfection of picture quality extending all the way to the extreme corners of the image field even at full aperture, as well as outstanding contrast throughout, at all apertures, even at close distances. Stopping down to f/2.8 or f/4 brings only a minimal increase in contrast. Distortion is extremely low and practically invisible. Its well-balanced design makes this ideal standard lens an outstanding choice in terms of all criteria, including image quality, speed, size, weight and price.
Angle of view (diagonal, horizontal, vertical) for 35 mm (24 x 36 mm) 47°, 40°, 27° for M8 digital (18 x 27 mm)
36°, 30°, 20°
corresponds to a focal length of approx. 67 mm with 35 mm-format
Optical design Number of lenses/groups 6 / 4 Focal length 52.3 mm Position of entrance pupil 25.1 mm (related to the first lens surface in light direction) Focusing range 0.7 m to infinity Distance setting Scales Combined meter/feet graduation Smallest object field 277 x 416 mm Largest reproduction ratio 1:11.5 Aperture Setting/Function With click-stops, half values available, manual diaphragm Lowest value 16 Bayonet Leica M quick-change bayonet with 6 bit lens identification bar code for digital M models Filter mount Non-rotating, internal thread for screw-on filters size E 39 Lens hood Built-in telescopic Dimension and weight: Length 43.5 mm Largest diameter 53 mm Weight approx. 240 g