Compact high-zoom-ratio real-image finder
AssigneeMinolta Camera Kabushiki Kaisha
InventorsIchiro Kasai, Katsuto Tanaka
Life of this patent
Estimating the term…
Abstract
A high-zoom-ratio real-image finder is provided with an objective lens system including a first lens unit having a positive power, a second lens unit having a negative power, a third lens unit having a negative power and a fourth lens unit having a positive power. Zooming is performed by moving the second and third lens units always in the same direction. A luminous flux restricting member is integrated with a holder for the second lens unit. A zoom strobe unit moves integrally with a holder for the third lens unit.
Claims8
A compact high-zoom-ratio real-image finder comprising an objective lens system including from an object side a first lens unit having a positive power, a second lens unit having a negative power, a third lens unit having a negative power and a fourth lens unit having a positive power, wherein zooming is performed by moving the second and third lens units in a same direction.
Dependencies are inferred from the claim text.