Abstract: The principal part of the any zoom system is a two-component zoom system, which creates the necessary range of magnifications, focal lengths and fields of view. Over the last few years the utilization of the zoom systems has significantly increased. It is possible to avoid unnecessary design complication by developing new design forms based on theory rather than adapting existing solutions. This paper explains the basic theory of two-component zoom systems and presents a few new relatively simple high performance designs.!4
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