Patent ID: 7961403

Claim:
A zoom lens comprising: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; and a rear group including at least one lens unit, wherein the first lens unit, the second lens unit, the third lens unit, and the rear group are arranged in order from an object side to an image side, wherein the second lens unit and the third lens unit move for zooming, and wherein the following conditions are satisfied: 3.00<(β2 t×β 3 w )/(β2 w×β 3 t )<5.85 −0.50 <M 3 /Lt<− 0.10 where β2w and β2t represent imaging magnifications of the second lens unit at a wide angle end and a telephoto end, β3w and β3t represent imaging magnifications of the third lens unit at the wide angle end and the telephoto end, M 3 represents a moving amount of the third lens unit along an optical axis during zooming from the wide angle end to the telephoto end, and Lt represents a total lens length of the zoom lens at the telephoto end.