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Leica APO-Summicron-SL 75mm f/2 Asph black anodized finish
Street, portrait, or whatever catches your eye: Conceived as a universal lens for all situations, the APO-Summicron-SL 75 f/2 ASPH. opens up new horizons for phot ...
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Beschrijving
Street, portrait, or whatever catches your eye: Conceived as a universal lens for all situations, the APO-Summicron-SL 75 f/2 ASPH. opens up new horizons for photography in the transitional zone between standard and telephoto focal lengths. It is perfectly matched to the modern SL-System and has been conceived for a long working life under professional shooting conditions. In addition to this, the maximum achievable reproduction ratio of 1:5 contributes even more to the versatility of the lens.
The AF system of the Summicron-SL lenses is fast, precise, and almost silent. They thank their outstanding AF performance figures to the autofocus drive unit they share. 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. In order to preserve the compact dimensions of the lenses, the integration of these components must follow an integral approach.
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. This system, comprising two particularly light focusing lenses, allows the construction of particularly small and compact drive systems. In addition to space limitations, the choice of the drive motors is also determined by the AF principle used for focusing.
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 this procedure, the focusing lenses must be moved rapidly backwards and forwards in accordance with the speed specifications of the contrast AF system. This requires a dynamic drive system without any play.
In the Summicron-SL lenses, the drive units installed are extremely powerful and robust stepping motors with Dual Syncro Drive™. Thanks to these, the entire focusing throw can be traveled completely in fractions of a second. 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.
With an initial aperture of f/2, the SL-Summicron lenses are significantly more compact than faster lenses, but still allow photographers to work with similar depth of field. The reason for this is contrast: the zone of highest contrast is perceived by viewers as being sharp, while zones with lower contrast are regarded as being unsharp.
In the case of SL-Summicron lenses, this difference in contrast is considerably higher than that of conventional lenses: sharply focused objects show much higher contrast than objects that are out of focus. This means that objects “snap” more distinctly out of the foreground or background and more effectively isolate the subject. This creates a three-dimensional visual effect with very impressive apparent depth.
Specificaties
- Referentie: 11178
- Filtersize: E67
- Weight: 720g
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