Optical image capturing system

An optical image capturing system comprising, in order from an object side to an image side thereof, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element, wherein each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element has an object-side surface facing toward the object side, and an image-side surface facing toward the image side, wherein:

• the first lens element with positive refractive power having at least one convex shape at a peripheral region of the object-side surface thereof;
• the second lens element having negative refractive power;
• the third lens element having the object-side surface and the image-side surface thereof being both aspheric;
• the fourth lens element having the object-side surface and the image-side surface thereof being both aspheric;
• the fifth lens element having at least one convex shape at a peripheral region of the image-side surface thereof, wherein the object-side surface and the image-side surface of the fifth lens element are both aspheric;
• the sixth lens element with positive refractive power having at least one convex shape at a peripheral region of the image-side surface thereof, wherein the object-side surface and the image-side surface of the sixth lens element are both aspheric;
• and
• the seventh lens element with negative refractive power having the image-side surface being concave at a paraxial region thereof, wherein the image-side surface of the seventh lens element changes from concave at a paraxial region thereof to convex at a peripheral region thereof, and the object-side surface and the image-side surface of the seventh lens element are both aspheric;
• wherein the optical image capturing system has a total of seven lens elements, each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element is a single and non-cemented lens element, and the optical image capturing system further comprises an aperture stop, the aperture stop is positioned on the object side of the third lens element, a focal length of the optical image capturing system is f, a curvature radius of the image-side surface of the seventh lens element is R14, a vertical distance from a critical point on the image-side surface of the seventh lens element to an axial vertex on the image-side surface of the seventh lens element is Yc72, and the following relationships are satisfied:
• 0.1<R14/f<1.0;
• and
• 0.1<Yc72/f<0.9.