16.26 OPTICAL INSTRUMENTS

respectively. A positive distance indicates that the pupil is to the right of the appropriate vertex.

16.6 ACKNOWLEDGMENTS

The authors would like to acknowledge data provided by R. Mühlschlag of Jos. Schneider Optische Werke and C. Marcin of Schneider Corporation of America. We also appreciate permission granted by Panavision Corporation to use data pertaining to the Primo zoom lens.

16.7 REFERENCES

Betensky, E. I., "Photographic Lenses," in R. Shannon and J. Wyant (eds.), Applied Optics and Optical Engineering, vol. 8, Academic Press, New York, 1980.

Cook, G. H., "Photographic Objectives," in R. Kingslake (ed.), Applied Optics and Optical Engineering, vol. 3, Academic Press, New York, 1965.

Figures 1-18 contain data that was originally derived from the following United States Patents. The patents are listed in order corresponding to the figure order. USP 4,431,273; 4,381,888; 4,095,873; 3,830,554; 4,770,512; 4,333,714; 4,136,931; 4,303,315; 4,792,216; 4,110,007; 3,942,875; 4,786,152: 4,732,459; 5,018,843 (Figs. 14-16); 4,758,073 (Figs. 17-18).

Kingslake, R., A History of the Photographic Lens, Academic Press, Inc., San Diego, 1989.

Kingslake, R., Optics in Photography, SPIE Press, Bellingham, WA, 1992.