Wide-angle lens assembly including six lenses of -+-++-refractive powers, or five lenses of --++-refractive powers

A wide-angle lens assembly comprising:

• a front lens group;
• and
• a rear lens group;
• wherein the front lens group comprises a first lens having negative refractive power and a second lens having negative refractive power, wherein the first lens is a meniscus lens and the second lens comprises a concave surface facing an image side;
• wherein the rear lens group comprises a third lens having positive refractive power, a fourth lens having positive refractive power, and a fifth lens having negative refractive power, wherein the fifth lens comprises a concave surface in a paraxial region facing an object side;
• wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in order from the object side to the image side along an optical axis;
• wherein the wide-angle lens assembly satisfies:
• 13.6 mm≤fK−f1≤25.2 mm;
• wherein fK is an effective focal length of a lens third close to the image side and f1 is an effective focal length of the first lens;
• wherein the front lens group further comprises a sixth lens having positive refractive power and disposed between the first lens and the second lens and the sixth lens comprises a concave surface a convex surface facing the object side and the concave surface of the sixth lens faces the image side.