Zoom lens system and image pickup apparatus including the same
AssigneeCanon Kabushiki Kaisha
InventorNobuyuki Miyazawa
Life of this patent
Estimating the term…
Abstract
At least one exemplary embodiment is directed to a zoom lens system which includes, in order from an object side to an image side, a first lens unit with positive optical power, a second lens unit with negative optical power, a third lens unit with positive optical power, a fourth lens unit with positive or negative optical power, and a fifth lens unit with positive optical power. In at least one exemplary embodiment of this zoom lens system, during zooming, the second lens unit, the third lens unit, and the fifth lens unit can move along the optical axis.
Claims12
A zoom lens system comprising, in order from an object side to an image side:
- a first lens unit with positive optical power;
- a second lens unit with negative optical power, the second lens unit moving along an optical axis during zooming;
- a third lens unit with positive optical power, the third lens unit moving along the optical axis during zooming;
- a fourth lens unit;
- and
- a fifth lens unit with positive optical power, the fifth lens unit moving along the optical axis during zooming,
- wherein a distance between the first lens unit and the second lens unit, a distance between the second lens unit and the third lens unit, a distance between the third lens unit and the fourth lens unit, and a distance between the fourth lens unit and the fifth lens unit vary during zooming.
Dependencies are inferred from the claim text.