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The optical computation of this lens leads to perfect image quality that extends into the corners at full aperture, with outstanding contrast over the entire picture area, even in the close-up range. Number of elements / groups: 6 / 4 Focal length: 52.3 mm Entrance pupil: 25.1 mm (related to the first lens surface in light direction) Focusing range: 0.7 m to Infinity Stopping down to f/2.8 or f/4 brings only a minimal increase in contrast. Distortion is extremely low and practically undetectable. The ideal lens for all photographers who want a high-performance tool that weighs very little and is compact in size. Special order only - please allow 3-5 working days for delivery.
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