Recent Trends and Developments of Zoom Lenses

Extensive use and better understanding of the full potentialities of zoom lenses have resulted in the evolution of new techniques of studio operation and viewer presentation in broadcast television. The emerging pattern of future usage and the present state of the optical art suggest that many of the types of zoom lenses in use today may have reached the limits of modification and improvement. Although the tendency toward smaller studio settings is an important factor, there are other aspects of operation and viewer presentation which put additional emphasis on the requirements of wider angular field of view and shorter working distances. It is this emphasis which indicates that new optical principles of construction are essential for the future. A family of zoom lenses has recently been developed that employs three moving members instead of the conventional two, thus providing more numerous and more useful optical design variables while at the same time combining optical and mechanical compensation for image shift in a manner which simplifies some of the mechanical problems which at present are typical of mechanically compensating systems.

Print ISSN

0361-4573

Published

1971-08

Content type

Original Research

DOI

10.5594/J05769