Leica APO-SUMMICRON-SL 50mm f/2 Aspherical Lens - Open Box

Leica APO-Summicron-SL 50 mm f/2 ASPH.
Anything but a standard lens
Leica APO-Summicron-SL 50 mm f/2 ASPH. Perfectly matched to the state-of-the-art SL-System, with one of the fastest autofocus systems in the professional camera segment, the APO-Summicron-SL 50 f/2 ASPH. captures the essence of special moments in a flash with razor-sharp fidelity.

AF System with Dual Syncro Drive
From zero to sharp in no time at all
The autofocus system shared by the Summicron-SL lenses is fast, precise, and nearly silent. Their outstanding AF performance figures are thanks to the autofocus drive unit they both utilize. These are limited only by the mass of the glass elements moved when focusing; the speed of moving from infinity to the closest focusing distance. In order to preserve the compact dimensions of the lenses, the integration of these components must be perfectly optimized within all design constraints

Higher Contrast
for greater visual depth
With a maximum aperture of f/2, the SL-Summicron lenses are significantly more compact than even faster lenses, but still allow photographers to work with similar depth of field. The reason for this is contrast: the area of highest contrast is incredibly sharp, while zones with lower contrast are unsharp or beautifully blurred.

Constructional Details
What makes the APO-Summicron-SL 50 f/2 ASPH. so special is an optical system comprising of 12 lens elements produced with unique expertise and the latest manufacturing technology by Leica. Of these, three elements with four aspherical surfaces correct monochromatic aberration, while eight elements manufactured from specially formulated, high-quality glass types ensure chromatic correction throughout the entire focusing range. Only the particular optical property of these glass types, known as anomalous partial dispersion, makes it possible to compensate for chromatic aberrations with such perfection. As a consequence of this, even highlights in images remain almost completely free of color fringing.