Olympus Corporation

Olympus Imaging Corporation

Koki Hozumi

Koji Nakagawa

Kazuteru Kawamura

Masaru Morooka

Takeshi Hosoya

Hideyuki Nagaoka

Akiko Naito

A zoom lens includes a first positive lens unit, a first negative lens unit, a stop, and a second positive lens unit, and at the time of zooming, the first positive lens unit is stationary, the first negative lens unit and the second positive lens unit move, and at the time of focusing, the first positive lens unit is stationary, and the first positive lens unit includes a reflecting member and a first positive lens unit object-side system, and the first positive lens unit-object side system is positioned on the object side of the reflecting member, and has a negative refractive power, and the following conditional expressions are satisfied.3.7&#x3c;1.55&#x3c;||&#x3c;2.51.75&#x3c;||&#x3c;2.5

Zoom lens and image pickup apparatus using the same

A zoom lens includes a first lens group of positive refractive power; a second lens group of negative power; a third lens group of positive power; a fourth lens group of negative power, and a fifth lens group of positive power arranged from the object side to the image side. At activation of variable power from the wide angle end to the telescopic end, the first, third, fourth and fifth lens groups moves so as to get closer to the object side or the image side at the telescopic end than at the wide angle end; and a gap between the first lens group and the second lens group increases; a gap between the second lens group and the third lens group decreases; a gap between the third lens group and the forth lens group increases; and a gap between the forth lens group and the fifth lens group increases.

Zoom lens and image pickup apparatus having the same

Growing community of inventors

Tokyo, Japan

Koki Hozumi