Camera having powered zoom lens

A camera having a power zoom lens, comprising:

• memory means for storing object distances of more than one object to be taken at one time, detected by an object distance measuring device, said object distances varying from one another;
• control means for varying depth of field of the powered zoom lens in accordance with said stored object distances by adjusting at least one of a focal length and a diaphragm value of the powered zoom lens to a focal length and a diaphragm setting which ensure that all of the objects represented by said varying object distances fall within a depth of field which is determined by said object distances stored in said memory means and the variation in at least one of the focal length and diaphragm value and
• arithmetic operation means for conducting arithmetic calculations to obtain a diaphragm value, object distances in focus, and focal length so that more than two object distances stored in said memory means fall within the depth of field.

A camera having a powered zoom lens comprising:

• object distance measuring means for detecting distances of a plurality of objects to be photographed at one time, said plurality of objects being at different distances from said camera;
• driving means for changing a focal length of the powered zoom lens;
• control means for controlling said driving means to drive said powered zoom lens for varying a depth of field of said powered zoom lens in accordance with said measured object distances, by changing a focal length of said powered zoom lens such that all of the plurality of objects to be photographed at one time are within a depth of field of said powered zoom lens.

The camera having a powered zoom lens according to claim 15, further comprising means for determining whether the plurality of objects are within a depth of field of said powered zoom lens at a predetermined focal length, said control means being operative to change the focal length of said powered zoom lens in response to a determination that the plurality of objects are not within a depth of field of said powered zoom lens at said predetermined focal length.

The camera having a powered zoom lens according to claim 17, further comprising means for determining if the plurality of objects are within a depth of field of said powered zoom lens when said diaphragm value has been changed to a maximum diaphragm value, and, in response to a determination that the plurality of objects are not within the depth of field at said maximum diaphragm value, controlling said driving means for changing the focal length of said powered zoom lens in a direction to bring the plurality of objects within a depth of field.