Imaging lens, and electronic apparatus including the same

An imaging lens comprising a first lens element, an aperture stop, a second lens element, a third lens element and a fourth lens element arranged in order from an object side to an image side along an optical axis of said imaging lens, each of said first lens element, said second lens element, said third lens element and said fourth lens element having an object-side surface facing toward the object side, and an image-side surface facing toward the image side, wherein:

• said first lens element has a negative refractive power;
• said object-side surface of said first lens element has a convex portion in a vicinity of the optical axis;
• said second lens element has a positive refractive power;
• said third lens element has a positive refractive power;
• said object-side surface of said third lens element has a concave portion in a vicinity of the optical axis;
• said fourth lens element has a negative refractive power;
• said image-side surface of said fourth lens element has a concave portion in a vicinity of the optical axis, and a convex portion in a vicinity of a periphery of said fourth lens element;
• said imaging lens satisfies 6.0≧T3/G23≧2.0, where T3 represents a thickness of said third lens element at the optical axis, and G23 represents an air gap length between said second lens element and said third lens element at the optical axis;
• and
• said imaging lens does not include any lens element with refractive power other than said first lens element, said second lens element, said third lens element and said fourth lens element.