Optical imaging lens and electronic device comprising the same

An optical imaging lens set, from an object side toward an image side in order along an optical axis comprising:

• a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, said first lens element to said sixth lens element each having an object-side surface facing toward the object side as well as an image-side surface facing toward the image side, wherein:
• said first lens element has an image-side surface with a convex portion in a vicinity of its periphery;
• said second lens element has an image-side surface with a concave portion in a vicinity of said optical axis and a convex portion in a vicinity of its periphery;
• said third lens element is made of plastic;
• said fourth lens element has an image-side surface with a concave portion in a vicinity of its periphery;
• said fifth lens element is made of plastic;
• and
• said sixth lens element is made of plastic and has an object-side surface with a concave portion in a vicinity of said optical axis, and said optical imaging lens set exclusively has said first lens element, said second lens element, said third lens element, said fourth lens element, said fifth lens element and said sixth lens element with refractive power, wherein an effective focal length EFL of said optical imaging lens set and a thickness T1 of said first lens element along said optical axis satisfy a relationship EFL/T1≦7.5.