Zoom lens

A zoom lens comprising, in order from an object side to an image side:

• a first lens unit having a positive refractive power;
• a second lens unit having a negative power;
• and
• a rear unit having a positive refractive power as a whole and including one or more lens units,
• wherein a distance between adjacent lens units changes during zooming,
• wherein the first lens unit includes a first subunit having a positive refractive power and a second subunit disposed on the image side of the first subunit,
• wherein the first subunit includes a first positive lens,
• wherein the second subunit includes a second positive lens and a first negative lens,
• wherein the first positive lens is a lens having the smallest absolute value of a focal length among lenses included in the first subunit,
• wherein the first negative lens is a lens having the smallest absolute value of a focal length among negative lenses included in the second subunit, and wherein the following inequalities are satisfied:
• 0.10<d11/f11<0.50
• 0.6<f11/f1<2.0
• −8.0<f1/f2<−2.5
• where d11 is a distance on an optical axis from the first subunit to the second subunit, f11 is a focal length of the first subunit, f1 is a focal length of the first lens unit, and f2 is a focal length of the second lens unit.