Patent ID: 9671596
Date: 2017-06-06
CPC Classifications: G02B,G03B

Claim:
1. A plurality of imaging optical systems comprising: at least two imaging optical systems having different focal lengths, wherein each imaging optical system in the plurality of imaging optical systems comprises an identical diaphragm member, and each imaging optical system comprises in order from an object side, a front lens unit having a positive refractive power, a focusing lens unit having a negative refractive power, and a rear lens unit having a positive refractive power, and at the time of focusing, only the focusing lens unit moves on an optical axis, and each imaging optical system satisfies the following conditional expression (1), and the plurality of imaging optical systems satisfies the following conditional expressions (2) and (3): where, f f APΦ APΦ f f the maximum focal length and the minimum focal length are to be obtained by comparing absolute values of the focal lengths.