Internal Focus Compact Tamron 28-75mm f/4 and 28-80mm f/4.5 Patents Found

PROBLEM TO BE SOLVED: To provide a compact zoom lens and an image pickup device in which the fluctuation of the position of the center of gravity is small.
With the demand for high image quality of digital cameras, the size of the image sensor is increasing and the short flange back is being adopted by mirrorless cameras, etc., and the miniaturization of the optical system is required. In addition, cameras mounted on moving objects such as drones have become widespread, and in order to realize stable shooting even when moving, there is a demand for a zoom lens in which the position of the center of gravity does not fluctuate during zooming.
According to the present invention, it is possible to provide a compact zoom lens and an image pickup device in which the fluctuation of the position of the center of gravity at the time of scaling is small.