Zoom lens and image pickup apparatus having the same

An image pickup apparatus comprising:

• a zoom lens;
• and
• an image sensor that receives an optical image formed by the zoom lens,
• wherein the zoom lens includes, in order from an object side to an image side:
• a front group, an intermediate group, and a rear group, each of which includes one or more lens units,
• wherein each distance between adjacent lens units changes during zooming,
• wherein the front group consists of a first front lens unit with positive refractive power,
• wherein the first front lens unit is fixed relative to an image plane during zooming,
• wherein the intermediate group consists of, in order from the object side to the image side, a first intermediate lens unit with negative refractive power, a second intermediate lens unit with negative refractive power, and a third intermediate lens unit,
• wherein the third intermediate lens unit moves from the object side to the image side during zooming from a wide-angle end to a telephoto end, and
• wherein the following inequalities are satisfied:
• 0.001
• <
• TLM
• ⁢
• 1
• /
• fLF
• ⁢
• 1
• <
• 0
• .025
• 0.001
• <
• TLM
• ⁢
• 2
• /
• fLF
• ⁢
• 1
• <
• 0
• .022
• 0.1
• <
• MLM
• ⁢
• 1
• /
• fLF
• ⁢
• 1
• <
• 0
• .
• 3
• ⁢
• 9
• where fLF1 is a focal length of the first front lens unit, TLM1 is a distance on an optical axis from a lens surface closest to an object in the first intermediate lens unit to a lens surface closest to the image plane in the first intermediate lens unit, TLM2 is a distance on the optical axis from a lens surface closest to the object in the second intermediate lens unit to a lens surface closest to the image plane in the second intermediate lens unit, and MLM1 is a moving amount, where the moving amount toward the object side is positive, of the first intermediate lens unit during zooming from the wide-angle end to the telephoto end.