It is for this reason, most Leica M cameras included 28mm frame lines in the viewfinder as the default focal length. In this article, we will be taking a closer look at the most sought-after 28mm lens from Leica Camera, Leica Summicron M 28mm f/2.0 ASPH lens. The reason for the popularity of the 28mm focal length is its versatility as an all-purpose wide angle lens which is also the favorite focal length for most journalists.
This means that the Summicron-SL lenses achieve values that are among the best in the full-frame system segment in terms of speed, precision, and noise emissions.Leica Summicron M 28mm f/2.0 ASPH Lens Review IntroductionĪmong Leica camera has various wide angle lenses including the popular 28mm focal length lenses which include Leica Summicron M 28mm f/2.0 ASPH lens, Leica Summilux M 28mm f/1.4 ASPH lens, Leica Elmarit-M 28mm f/2.8 ASPH lens, Leica Summaron-M 28mm f/5.6 lens. Thanks to these, the entire focusing throw can be traveled completely in fractions of a second. In the Summicron-SL lenses, the drive units installed are extremely powerful and robust stepping motors with Dual Syncro Drive™. This requires a dynamic drive system without any play. In this procedure, the focusing lenses must be moved rapidly backwards and forwards in accordance with the speed specifications of the contrast AF system. Several contrast measurements at various focusing positions must be made before the correct direction of motion for focusing can be determined and followed by precise focusing. In addition to space limitations, the choice of the drive motors is also determined by the AF principle used for focusing. This system, comprising two particularly light focusing lenses, allows the construction of particularly small and compact drive systems. Specialists from the areas of optical and mechanical engineering and electronics worked together in an interdisciplinary team on the development of a unique lens concept based on double internal focusing. In order to preserve the compact dimensions of the lenses, the integration of these components must follow an integral approach. These are limited only by the mass of the lens elements moved when focusing, the travel from infinity to the closest focusing distance and, of course, the amount of space available. They thank their outstanding AF performance figures to the autofocus drive unit they share.
The AF system of the Summicron-SL lenses is fast, precise, and almost silent.
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