Vario-Sonnar
Encyclopedia
The Vario-Sonnar is a Carl Zeiss photographic lens
design. This lens type has an infinitely variable focal length
which can replace a whole series of lenses for a certain picture format.
Photographic lens
A camera lens is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.While in principle a simple convex lens will suffice, in...
design. This lens type has an infinitely variable focal length
Focal length
The focal length of an optical system is a measure of how strongly the system converges or diverges light. For an optical system in air, it is the distance over which initially collimated rays are brought to a focus...
which can replace a whole series of lenses for a certain picture format.