| 摘要 |
A fixed focal length lens has a focal length of a whole system shorter than a back focus. The fixed focal length lens includes an aperture stop, and an image-stabilizing lens unit that moves in a direction including a component of a direction orthogonal to an optical axis to reduce an image blur. The conditions of 0.1<f/|fis|<0.5 and−0.35<Dis/DL<0.25 are met, where f is the focal length of the whole system, fis is a focal length of the image-stabilizing lens unit, Dis is a distance from the aperture stop to a surface farthest from the aperture stop of the image-stabilizing lens unit, and DL is a distance 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 is positive in a direction from the object side to the image side. |
