Zoom lens and image pickup apparatus having the same

An image pickup apparatus comprising:

• a zoom lens comprising in order from an object side to an image side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power, wherein the first lens unit and the second lens unit move along respective loci different from each other during zooming;
• the first lens unit has two negative lenses which are arranged continuously from the object side to the image side;
• and
• the following conditional expressions are satisfied:
• −4.0<f1/fw<−2.9
• −0.65<f1/f2<−0.30
• −0.8<(fG11/f1)−(fG12/f1)<9.0
• where f1 represents a focal length of the first lens unit, f2 represents a focal length of the second lens unit, fw represents a focal length of the zoom lens at a wide angle end, fG11 represents a focal length of a negative lens (G11) disposed on most object side in the negative lenses contained in the first lens unit, and fG12 represents a focal length of a negative lens (G12) disposed on second most object side in the negative lenses contained in the first lens unit;
• and
• an image pickup element which receives light of an image that is formed by the zoom lens.