Macro Lens System And Imaging Apparatus

Abstract

A macro lens system includes, in this order from an object side: a positive first lens group; a negative second lens group; a positive third lens group; a positive fourth lens group; a positive fifth lens group; and a negative sixth lens group. The first lens group is constituted by three lenses. The second lens group, the fourth lens group, and the fifth lens group are independently moved in the direction of the optical axes thereof when focusing from an object at infinity to an object at a most proximate distance.

Description

technical field [0001] The present invention relates to a macro lens suitable for electronic cameras such as a digital camera, a video camera, a broadcast camera, and a monitor camera, and an imaging device equipped with the macro lens. Background technique [0002] Conventionally, there are macro lenses whose main purpose is to perform close-up photography at approximately equal magnification. [0003] The macro lens is designed to be able to focus continuously when shooting from an object at infinity to a close-up object with a photographing magnification of about the same magnification, and to obtain high optical performance especially when shooting a close-up object. [0004] Generally, in order to suppress fluctuations in aberrations accompanying focusing, a floating focus method in which two or more lens groups are moved during focusing is used. [0005] Conventionally, a front focus type has been used in which the lens group on the most object side protrudes forward ...

AI Technical Summary

Problems solved by technology

[0011] In the technical solution described in Patent Document 1, there are many lenses, and the overall weight of the lens is heavy, which is inconvenient to carry.

[0012] In addition, in the technical solution described in Patent Document 2, the number of lenses constituting the imaging lens is relatively small, and it is relatively light, but it is difficult to call it compact.

Images