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For many photo enthusiasts, Carl Zeiss lenses have long been the ultimate choice.
It has been said that the depth and three-dimensionality they deliver is so distinctive that it was possible to tell whether or not an image was produced by a Zeiss lens while watching the image appear during development in the darkroom.
The appeal of Zeiss lenses remains unchanged, and many models are available, but the only autofocus Zeiss lenses available for use on digital SLR cameras are those that have been created through close cooperation between Carl Zeiss AG and Sony for the α-series cameras.
Below we'll examine three important aspects of Carl Zeiss optical technology.
The scientific approach
No discussion of the development of photographic lenses can be complete without the inclusion of Carl Zeiss AG. It was Ernst Abbe of the Zeiss company who first applied scientific principles to lens design, rather than relying on trial-and-error experience. In fact a significant portion of the history of photographic lens development centers on the Protar, Planar, and Sonnar designs that featured advanced optical paths based on those principles.
The Abbe number used in the evaluation of chromatic aberration, astigmatic lenses that minimize coma and spherical aberration, and apochromatic lenses made of fluorite, are all Carl Zeiss innovations. In many ways the history of Carl Zeiss AG is the history of photographic lenses.
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