Abstract
A zoom lens includes lens units that consist of, in order from an object side to an image side, a first lens unit having positive refractive power, a second lens unit, and a rear group including a plurality of lens units. Each distance between adjacent lens units changes during zooming. A lens unit disposed closest to an image plane in the zoom lens has negative refractive power. During zooming from a wide-angle end to a telephoto end, a distance between the first lens unit and the second lens unit increases and a distance between the second lens unit and the rear group increases. Predetermined inequalities are satisfied.
Full Text
What is claimed is:
A zoom lens includes lens units that consist of, in order from an object side to an image side, a first lens unit having positive refractive power, a second lens unit, and a rear group including a plurality of lens units. Each distance between adjacent lens units changes during zooming. A lens unit disposed closest to an image plane in the zoom lens has negative refractive power. During zooming from a wide-angle end to a telephoto end, a distance between the first lens unit and the second lens unit increases and a distance between the second lens unit and the rear group increases. Predetermined inequalities are satisfied.
Timeline
Filed
04/24/2026Published
09/03/2026Granted
Not AvailableIPC Codes(2)
G02B 15/14:by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
G02B 15/20:having an additional movable lens or lens group for varying the objective focal length