Wide-angle zoom lens and photographing apparatus using the same
AssigneeOlympus Optical Co., Ltd.
InventorKazuya Nishimura
Life of this patent
Estimating the term…
Abstract
A wide-angle zoom lens includes a first lens unit with a positive refracting power and a second lens unit with a negative refracting power so that a space between these lens units is changed and thereby the magnification of the zoom lens can be varied. The first lens unit is constructed with a first lens component which is only one negative lens component in the first lens unit, placed at the most object-side position, and at least three positive lens components arranged on the image side of the first lens component to provide air spaces between them. Each of lens components constituting the first lens unit is constructed with a single lens element.
Claims16
A wide-angle zoom lens comprising, in order from object side:
- a first lens unit with a positive refracting power;
- and
- a second lens unit with a negative refracting power,
- a space between said first lens unit and said second lens unit being changed, thereby varying a magnification of said zoom lens,
- wherein said first lens unit comprises a first lens component which is only one negative lens component in said first lens unit, placed at a most object-side position, and at least three positive lens components arranged on an image side of said first lens component so as to provide air spaces between said three lens components, and each of lens components constituting said first lens unit is constructed with a single lens element.
A photographing apparatus including a wide-angle zoom lens as a photographing objective lens, said wide-angle zoom lens comprising, in order from object side:
- a first lens unit with a positive refracting power;
- and
- a second lens unit with a negative refracting power,
- a space between said first lens unit and said second lens unit being changed, thereby varying a magnification of said zoom lens,
- wherein said first lens unit comprises a first lens component which is only one negative lens component in said first lens unit, placed at a most object-side position, and at least three positive lens components arranged on an image side of said first lens component so as to provide air spaces between said three lens components, and each of lens components constituting said first lens unit is constructed with a single lens element.
Dependencies are inferred from the claim text.