A zoom lens of the negative lead type includes comprises, in order from an object side, a first lens unit of negative refractive power and a second lens unit of positive refractive power, variation of magnification being effected by varying a separation between the first lens unit and the second lens unit, the zoom lens satisfying the following conditions:

where NL1 and NL2 are numbers of lens elements which constitute the first lens unit and the second lens unit, respectively.

 
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