Patent ID: 8861085

Claim:
A fixed focal length lens comprising: an aperture stop; and an image-stabilizing lens unit configured to move in a direction including a component of a direction orthogonal to an optical axis to reduce an image blur, wherein the following conditions are met: 0.1 <f/|fis|< 0.5; −0.35 <Dis/DL< 0.25; and 0.1<|(1 −βis )β r|< 0.65, where f is a focal length of the fixed focal length lens, fis is a focal length of the image-stabilizing lens unit, Dis is a distance on the optical axis from the aperture stop to a surface farthest from the aperture stop of the image-stabilizing lens unit, DL is a distance on the optical axis from a first surface closest to an object side to a final surface closest to an image side of the fixed focal length lens, a sign of the distance on the optical axis is positive in a direction from the object side to the image side, βis is a lateral magnification of the image-stabilizing lens unit, βr is a lateral magnification of a lens system that is positioned at the image side relative to the image-stabilizing lens unit, and each of the lateral magnifications is a value obtained in a state where the fixed focal length lens is focused on an infinity, wherein the focal length of the fixed focal length lens is shorter than a back focus of the fixed focal length lens.