Optical photographing lens assembly, image capturing device and electronic device
An optical photographing lens assembly includes, in order from an object side to an image side, 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. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element has refractive power. The third lens element has refractive power. The fourth lens element has refractive power. The fifth lens element with refractive power has an image-side surface being convex in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fifth lens element are both aspheric. The sixth lens element with refractive power has an object-side surface and an image-side surface being both aspheric. The optical photographing lens assembly has a total of six lens elements with refractive power.
1. An optical photographing lens assembly comprising, in order from an object side to an image side:
a first lens element having an image-side surface being convex in a paraxial region thereof;
a second lens element;
a third lens element;
a fourth lens element;
a fifth lens element, wherein an image-side surface of the fifth lens element comprises at least one inflection point; and
a sixth lens element;
wherein a central thickness of the first lens element is a maximum among central thicknesses of the lens elements of the optical photographing lens assembly; the central thickness of the first lens element is greater than an axial distance between the fifth lens element and the sixth lens element;
wherein a focal length of the optical photographing lens assembly is f, an axial distance between an object-side surface of the first lens element and an image surface is TL, a half of a maximal field of view of the optical photographing lens assembly is HFOV, and the following conditions are satisfied:
0.70<TL/ f< 1.15; and
10.0 degrees<HFOV<25.0 degrees.
2. The optical photographing lens assembly of claim 1 , wherein the first lens element has positive refractive power, the third lens element has negative refractive power, the fourth lens element has an image-side surface being concave in a paraxial region thereof.
3. The optical photographing lens assembly of claim 1 , wherein the second lens element has negative refractive power, the fifth lens element has negative refractive power.
4. The optical photographing lens assembly of claim 1 , wherein the focal length of the optical photographing lens assembly is f, the axial distance between the object-side surface of the first lens element and the image surface is TL, and the following condition is satisfied:
0.70<TL/ f≤ 1.01.
5. The optical photographing lens assembly of claim 1 , wherein the half of the maximal field of view of the optical photographing lens assembly is HFOV, and the following condition is satisfied:
10.0 degrees<HFOV≤21.7 degrees.
6. The optical photographing lens assembly of claim 1 , wherein the focal length of the optical photographing lens assembly is f, a maximum image height of the optical photographing lens assembly is ImgH, and the following condition is satisfied:
2.0 <f /ImgH.
7. The optical photographing lens assembly of claim 1 , wherein the optical photographing lens assembly further comprises a stop, an axial distance from the object-side surface of the first lens element to the stop is Dr1s, an axial distance from the stop to the image-side surface of the first lens element is Dsr2, and the following condition is satisfied:
0.60<Dr1s/Dsr2.
8. The optical photographing lens assembly of claim 1 , wherein an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, an Abbe number of the fifth lens element is V5, an Abbe number of the sixth lens element is V6, and at least two of the V1, V2, V3, V4, V5 and V6 are smaller than 27.
9. The optical photographing lens assembly of claim 1 , wherein at least three of the lens elements of the optical photographing lens assembly have negative refractive power.
10. The optical photographing lens assembly of claim 1 , wherein each of at least three of object-side surfaces and image-side surfaces of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element of the optical photographing lens assembly comprises at least one inflection point.
11. The optical photographing lens assembly of claim 1 , wherein an axial distance between the second lens element and the third lens element is greater than a central thickness of the second lens element.
12. The optical photographing lens assembly of claim 1 , wherein an absolute value of a curvature radius of an object-side surface of the fourth lens element is greater than an absolute value of a curvature radius of the image-side surface of the fifth lens element.
13. An image capturing device, comprising:
the optical photographing lens assembly of claim 1 ; and
an image sensor disposed on the image surface of the optical photographing lens assembly.
14. An electronic device, comprising:
the image capturing device of claim 13 .