1868 rohr (3 Ergebnisse)

Zustand: New. In.

Zustand: New. In.

Soft cover. Zustand: Good. 24x16cm, (51) pages., Offprint from 'Ereignisse der Physiologie' VIII. Jahrgang. Pagination runs [541]-592. Minor wear. Corner bump. Small tear to spine. Good. [".,.von Rohr was an optical scientist at Carl Zeiss in Jena.,.usually credited with the design of the first aspheric lenses for eyeglasses. He invented the eyeglass lens designs that became the Zeiss Punktal lenses. He also developed a method of computing depth of field from a camera's entrance pupil location and diameter, without reference to focal length and f-number (see his 1904 and 1906 books). He says, 'At this point it will be sufficient to note that all these formulae involve quantities relating exclusively to the entrance-pupil and its position with respect to the object-point, whereas the focal length of the transforming system does not enter into them'. T. R. Dallmeyer refers to Von Rohr's 'interpretation' of depth of field in his 1899 book Telephotography.,."- wikipedia].