ZOOM LENS AND IMAGING UNIT HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a zoom lens suitable for a photographing system using a solid-state image pickup element, constituted of a small number of lenses, made compact, realizing a high variable power ratio and having excellent optical performance, and an imaging unit having the zoom lens. SOLUTION: The zoom lens is constituted of a 1st lens group L1 having negative refractive power, a 2nd lens group L2 having positive refractive power and a 3rd lens group L3 having positive refractive power in order from an object side to an image side and performs zooming by changing space between the respective lens groups. In the zoom lens, the 1st lens group L1 is constituted of an 11th lens having negative refractive power and a 12th lens having positive refractive power, and the 11th lens has one or more aspherical surfaces and is constituted to satisfy a condition; 1.83