IMAGE CAPTURING OPTICAL SYSTEM, IMAGE CAPTURING DEVICE AND ELECTRONIC DEVICE

The invention discloses an image capturing optical system, an image capturing device and an electronic device. The image capturing optical system includes ten lenses. The ten lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens from the object side to the image side along an optical path. Each of the ten lenses has an object-side surface facing the object-side direction and an image-side surface facing the image-side direction. The first lens element has positive refractive power. The second lens element has an image-side surface being concave in a paraxial region thereof. The tenth lens element has negative refractive power. At least one of an object-side surface and an image-side surface of at least one lens in the image capturing optical system has at least one critical point at an off-axis position. When specific conditions are met, the image capturing optical system can meet the requirem