Leica -Apo -Summicron N SL 28mm f/2 Asph Lens

Suberb Optics for Excellent Wide-Open Performance

13 lens elements (three of which feature aspherical surfaces on both sides) in ten groups contribute to a maximum level of image quality even at wide open aperture. As is generally the case with Leica lenses, the maximum aperture is synonymous with the effective aperture. Consequently, there is no need to stop down to increase the image quality – instead, reducing the aperture is only necessary for compositional purposes.

Natural skin tones, soft transitions into bokeh, exceptionally contrast-rich details and edge-to-edge sharpness across a distortion-free image: these qualities are very much the norm for Leica lenses. Yet the APO-Summicron-SL 28 f/2 ASPH. is further distinguished by its apochromatic correction, which is a notable feature in a lens of this focal length.

To ensure the optimal correction of chromatic aberrations, the majority of the grouped lens elements feature anomalous partial dispersion, and are made of high-quality, specialist glass types whose construction is so elaborate that even Leica’s innovative production methods are utilised to within every last inch of their capacity.

High Performance Focus

The autofocus drive employs extremely robust and high-performance stepping motors with DSD® (Dual Syncro Drive™). This enables the AF to travel the entire focusing range in around 250 milliseconds. At the same time, the lens features an entirely new manual focus ring construction in the form of an embedded ring magnet with alternating north-south polarisation. When the ring is turned, the magnetic field changes its polarity. A sensor monitors the status of the magnetic field and sends the data to the main processor. The drive then shifts the lens to the corresponding focusing position on the basis of the angle of rotation and the rotational speed – this, in turn, enables even faster and more precise manual focusing.

Cutting-edge Construction

Both the construction and the design of the cutting-edge LEICA - APO-SUMMICRON SL 28mm f2 ASPH. Lens represent the next step forward in the development of lenses for the Leica SL-System. New, extremely precise manufacturing methods and measuring technologies have been developed – resulting in more compact dimensions and a considerably lower weight, as well as a truly outstanding imaging performance.

In the construction of the APO-SUMMICRON SL 28mm f2 ASPH. Lens, particular attention has been paid to the prevention of stray light and reflections. In addition to optimising the optical and mechanical design, unavoidable reflections has been reduced to an absolute minimum by applying a high-quality coating to the lens surfaces.

Thanks to effective sealing against dust, moisture and water spray, as well as Aquadura coating of the exposed lens surfaces, theextremely durable LEICA - APO-SUMMICRON SL 28mm f2 ASPH. Lens can be used in almost all weather conditions without any reason for concern.