IMAGE CAPTURING OPTICAL SYSTEM AND IMAGE CAPTURING DEVICE

Japanese Patent JP2019124744

A

To provide an image capturing optical system which is compact and yet offers a wide view angle, superior optical performance, and high stability against change in ambient temperature.SOLUTION: An image capturing optical system 10 substantially consists of a first lens L1 having negative power, second lens L2, third lens L3 having positive power, fourth lens L4 having negative power, and fifth lens L5 having positive power, arranged in order from the object side, and has a half view angle of 40 degrees or greater. An object-side surface of the second lens L2 has a negative paraxial curvature radius, and an image-side surface of the second lens L2 has a negative paraxial curvature radius. The image capturing optical system satisfies a condition expressed as: 0.2