Photographic lens system and image pickup apparatus

A photographic lens system comprising:

• a first lens unit including a lens component, the lens component having a negative optical power and being movable in a first direction which includes a vector component orthogonal to an optical axis;
• and
• a plurality of lens units movable during focusing from an infinite or distant object to a close-up object, the plurality of lens units being disposed on the image side of the first lens unit,
• wherein an image formed by the photographic lens system is displaced when the lens component moves in the first direction,
• wherein the photographic lens system is a fixed focal length lens system,
• wherein the first lens unit has a positive optical power,
• wherein the plurality of lens units movable during focusing includes a second lens unit having a negative optical power, a third lens unit having positive optical power and being disposed on the image side of the second lens unit, a fourth lens unit having a negative optical power and being disposed on the image side of the third lens unit, and
• wherein the second lens unit moves to the image side and the third lens unit moves to the object side when focusing from an infinite or a distant object to a close-up object.