Pancratic (zoom) lens
For the purpose of achieving a focal range of between 4 and 15 mm and an aperture of at least 1:1.3, a pancratic taking lens is constructed merely from a negative and a positive lens cluster which can be mutually displaced relative to the optical axis. Due to the special relation of the focal length...
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| Format: | Patent |
| Sprache: | eng ; ger |
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| Zusammenfassung: | For the purpose of achieving a focal range of between 4 and 15 mm and an aperture of at least 1:1.3, a pancratic taking lens is constructed merely from a negative and a positive lens cluster which can be mutually displaced relative to the optical axis. Due to the special relation of the focal lengths of the lens clusters provided in the negative first element, the correction state of the lens is comparable to pancratic lenses constructed from four clusters and having the same power and aperture. |
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