Zoomobjektiv und Bildaufnahmevorrichtung

Details

Veröffentlichungs-Nr.

EP3467569

Aktenzeichen

EP18197666

Anmeldetag

28. September 2018

Veröffentlichung

5. Juni 2019

Rechtsraum

EP

IPC

G02B27/00G02B15/173

Abstract

A zoom lens includes, in order from the object side, a first positive lens unit that remains unmoved for zooming, a second negative lens unit that is moved for zooming, one or two zooming lens units that is moved for zooming, and a positive rear lens unit that remains unmoved for zooming. The intervals between adjacent lens units are changed during zooming. The rear lens unit is composed of a front sub lens unit within a range satisfying 0<d4a/d4<0.3, where d4 is the thickness of the rear lens unit, and d4a is the distance from the vertex of a lens closest to the object side in the rear lens unit, and a rear sub lens unit outside the range. The average Abbe numbers of convex and concave lenses in the front sub lens unit and the average partial dispersion ratio of the convex lenses are appropriately set.

Anmelder

Firma

CANON KABUSHIKI KAISHA

Land

🇯🇵 Japan

Fachgebiete