Zoom lens and image pickup apparatus
AssigneeKonica Minolta Opto, Inc.
InventorEigo Sano
Life of this patent
Estimating the term…
Abstract
A zoom lens including a first lens unit exhibiting a positive refractive power and always being statically positioned along an optical axis when a power of the zoom lens is varied or the focusing is conducted and including a reflective optical element for bending an optical path, a second lens unit exhibiting a negative refractive power and including a negative lens, a negative lens and a positive lens, along the optical axis in this order from an object side, a third lens unit exhibiting a positive refractive power, a fourth lens unit exhibiting a positive refractive power, and including at least two positive lenses, and a fifth lens unit exhibiting a negative refractive power, wherein the second lens unit, the fourth lens unit and the fifth lens unit are moved for varying the power of the zoom lens.
Claims15
A zoom lens, comprising:
- a first lens unit exhibiting a positive refractive power and always being statically positioned along an optical axis when a power of the zoom lens is varied or focusing is carried out, and including a reflective optical element for bending an optical path;
- a second lens unit exhibiting a negative refractive power, and including a negative lens, a negative lens and a positive lens, along the optical axis in this order from an object side;
- a third lens unit exhibiting a positive refractive power;
- a fourth lens unit exhibiting a positive refractive power, and including at least two positive lenses;
- and
- a fifth lens unit exhibiting a negative refractive power;
- wherein the first through fifth lens units are arranged along the optical axis in this order from an object side to an image side in the zoom lens, and
- the second lens unit, the fourth lens unit and the fifth lens unit are moved for varying the power of the zoom lens.
Dependencies are inferred from the claim text.