Abstract
A zoom lens includes, in order from an object side to an image side, a first lens unit having positive refractive power, a second lens unit having negative refractive power, a third lens unit having positive refractive power, a fourth lens unit having positive refractive power, and a fifth lens unit having negative refractive power. During zooming from a wide-angle end to a telephoto end, a distance between adjacent lens units changes, the first lens unit and the third lens unit are fixed, and the second lens unit and the fourth lens unit move. The third lens unit includes a negative lens and a positive lens. A predetermined condition is satisfied.
Full Text
What is claimed is:
A zoom lens includes, in order from an object side to an image side, a first lens unit having positive refractive power, a second lens unit having negative refractive power, a third lens unit having positive refractive power, a fourth lens unit having positive refractive power, and a fifth lens unit having negative refractive power. During zooming from a wide-angle end to a telephoto end, a distance between adjacent lens units changes, the first lens unit and the third lens unit are fixed, and the second lens unit and the fourth lens unit move. The third lens unit includes a negative lens and a positive lens. A predetermined condition is satisfied.
Timeline
Filed
03/26/2026Published
07/30/2026Granted
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 13/02:Telephoto objectives, i.e. systems of the type + – in which the distance from the front vertex to the image plane is less than the equivalent focal length