Zoom lens and image pickup apparatus

An image pickup apparatus comprising:

• a zoom lens;
• and
• an image sensor configured to capture an optical image formed by the zoom lens,
• wherein the zoom lens includes:
• a first lens unit having negative refractive power and disposed closest to an object;
• and
• a rear group including three or more lens units and disposed on an image side of the first lens unit,
• wherein a distance between adjacent lens units changes during zooming,
• wherein the first lens unit moves toward the image side during zooming from a wide-angle end to a telephoto end, and
• wherein in a case where a sign of a moving amount of a lens unit configured to move toward the image side during zooming from the wide-angle end to the telephoto end is set positive, the following inequalities are satisfied:
• 0.3
• ≤
• ML
• ⁢
• 1
• /
• TLt
• ≤
• 0.9
• ⁢
• -
• 0
• .
• 8
• ⁢
• 0
• ≤
• fL
• ⁢
• 1
• /
• ft
• ≤
• -
• 0.4
• where ML1 is a moving amount of the first lens unit during zooming from the wide-angle end to the telephoto end, TLt is an overall optical length of the zoom lens at the telephoto end, fL1 is a focal length of the first lens unit, and ft is a focal length of the zoom lens at the telephoto end.