18948076. OPTICAL SYSTEM AND IMAGE CAPTURING APPARATUS INCLUDING THE SAME (CANON KABUSHIKI KAISHA)
OPTICAL SYSTEM AND IMAGE CAPTURING APPARATUS INCLUDING THE SAME
Organization Name
Inventor(s)
Shinya Okuoka of Utsunomiya-shi (JP)
OPTICAL SYSTEM AND IMAGE CAPTURING APPARATUS INCLUDING THE SAME
This abstract first appeared for US patent application 18948076 titled 'OPTICAL SYSTEM AND IMAGE CAPTURING APPARATUS INCLUDING THE SAME
Original Abstract Submitted
An optical system includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, an intermediate unit including one or more lens units, and a final lens unit having a negative refractive power. The second lens unit is moved toward an image plane, and a lens unit closest to the image plane in the one or more lens units included in the intermediate unit is moved toward the object in focusing from infinity to a short distance. The second lens unit satisfies a predetermined inequality.