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Optical equipment with variable magnification optical system, this variable magnification optical system, and method for zooming zooming optical system
Optical equipment with variable magnification optical system, this variable magnification optical system, and method for zooming zooming optical system
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机译:具有变倍光学系统的光学设备,该变倍光学系统以及变焦光学系统的变焦方法
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摘要
PROBLEM TO BE SOLVED: To provide a variable power optical system having satisfactory optical performance, an optical device with the variable power optical system, and a variable power method of the variable power optical system.;SOLUTION: The variable power optical system ZL to be mounted in an electronic still camera 1 or the like has a front lens group FG and a rear lens group RG along an optical axis and in order from an object side. The rear lens group RG has a first lens group RG1 having a positive refracting power, a second lens group RG2 having a negative refracting power, and a third lens group RG3 having a positive refracting power. When a lens position condition is changed from a wide-angle end state to a telephoto end state, a space between the front lens group FG and the first lens group RG1 varies, a space between the first lens group RG1 and the second lens group RG2 increases, and a space between the second lens group RG2 and the third lens group RG3 decreases. The second lens group RG2 is constituted such that at least a part of the second lens group RG2 is movable so as to have a component in a direction perpendicular to the optical axis.;COPYRIGHT: (C)2010,JPO&INPIT
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