Zoom lens and image pickup apparatus using the same

Patent metadata

Field	Value
Publication number	US-9154705-B2
Application number	US-201414303938-A
Country	US
Kind code	B2
Filing date	Jun 13, 2014
Priority date	Jun 13, 2013
Publication date	Oct 6, 2015
Grant date	Oct 6, 2015

Abstract

A zoom lens comprising, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, a fourth lens unit having a negative refractive power, and a fifth lens unit having a positive refractive power. Each distance between the first lens unit and the second lens unit, between the third lens unit and the fourth lens unit, and between the fourth lens unit and the fourth lens unit at the telephoto end is longer than at the wide angle end, and a distance between the second lens unit and the third lens unit at the telephoto end is shorter than at the wide angle end, and the following conditional expressions are satisfied.

2< mg 3t /mg 3w <6

1.2< mg 5t /mg 5w <4

0.02< f 5 /f t <0.12

First claim

What is claimed is:

1. A zoom lens comprising in order from an object side to an image side:
a first lens unit having a positive refractive power;
a second lens unit having a negative refractive power;
a third lens unit having a positive refractive power;
a fourth lens unit having a negative refractive power; and
a fifth lens unit having a positive refractive power, wherein
at the time of zooming, each of the first lens unit, the second lens unit, the third lens unit, th…

Assignees

• Olympus Imaging Corp
• Olympus Corp

Inventors

• Morooka Masaru
• Kon Toyoki
• Imamura Masahiro
• Ueda Minoru

Classifications

• H04N23/69

  Electricity · mapped topic

• G02B27/646

  Physics · mapped topic

• H04N5/23296 Primary

  Electricity · mapped topic

• G02B15/173

  Physics · mapped topic

• G02B15/16 Primary

  Physics · mapped topic