Image capturing lens system, image capturing apparatus and electronic device

1. An image capturing lens system, comprising six lens elements, the six lens elements being, in order from an object side to an image side:

a first lens element with positive refractive power having an object-side surface being convex thereof;

a second lens element having negative refractive power;

a third lens element;

a fourth lens element;

a fifth lens element with negative refractive power having an image-side surface being concave, at least one of an object-side surface and the image-side surface thereof being aspheric, and at least one inflection point thereof; and

a sixth lens element;

wherein an Abbe number of the sixth lens element is V 6 , a focal length of the image capturing lens system is f, a curvature radius of the object-side surface of the first lens element is R 1 , and the following conditions are satisfied:

V 6<30; and

3.10< f/R 1<7.50.

2. The image capturing lens system of claim 1 , wherein the first lens element has an image-side surface being concave thereof, and the second lens element has an image-side surface being concave thereof.

3. The image capturing lens system of claim 1 , further comprising an aperture stop disposed between an imaged object and the third 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 and the sixth lens element is a single lens element, and a maximum refractive index among the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element is Nmax, and the following condition is satisfied:

N max<1.70.

4. The image capturing lens system of claim 1 , wherein a vertical distance between a critical point on the image-side surface of the fifth lens element and an optical axis is Yc 52 , the focal length of the image capturing lens system is f, and the following condition is satisfied:

0.05< Yc 52/ f< 0.50.

5. The image capturing lens system of claim 1 , wherein the focal length of the image capturing lens system is f, a maximum image height of the image capturing lens system is ImgH, and the following condition is satisfied:

2.35< f /Img H.

6. The image capturing lens system of claim 1 , wherein an axial distance between the first lens element and the second lens element is T 12 , an axial distance between the fifth lens element and the sixth lens element is T 56 , an axial distance between the second lens element and the third lens element is T 23 , an axial distance between the third lens element and the fourth lens element is T 34 , an axial distance between the fourth lens element and the fifth lens element is T 45 , and the following condition is satisfied:

( T 12+ T 56)/( T 23+ T 34+ T 45)<0.30.

7. The image capturing lens system of claim 1 , wherein a focal length of the first lens element is f 1 , a focal length of the second lens element is f 2 , a focal length of the third lens element is f 3 , a focal length of the fourth lens element is f 4 , a focal length of the fifth lens element is f 5 , a focal length of the sixth lens element is f 6 , and the following condition is satisfied:

| f 1|<| f 3|; | f 1|<| f 4|; | f 1|<| f 6|;

| f 2|<| f 3|; | f 2|<| f 4|; | f 2|<| f 6|;

| f 5|<| f 3|; | f 5|<| f 4|; and | f 5|<| f 6|.

8. The image capturing lens system of claim 1 , wherein an axial distance between the first lens element and the second lens element is T 12 , an axial distance between the second lens element and the third lens element is T 23 , an axial distance between the third lens element and the fourth lens element is T 34 , an axial distance between the fourth lens element and the fifth lens element is T 45 , an axial distance between the fifth lens element and the sixth lens element is T 56 , a maximum axial distance among T 12 , T 23 , T 34 ,T 45 and T 56 is T 45 .

9. The image capturing lens system of claim 1 , wherein an entrance pupil diameter of the image capturing lens system is EPD, a maximum image height of the image capturing lens system is ImgH, and the following condition is satisfied:

0.70<EPD/Img H< 1.50.

10. The image capturing lens system of claim 1 , wherein the third lens element has at least one inflection point thereof, an axial distance between an image-side surface of the sixth lens element and an image surface is BL, an axial distance between an object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, and the following conditions are satisfied:

0< BL/TD< 0.40.

11. An image capturing lens system, comprising six lens elements, the six lens elements being, in order from an object side to an image side:

a first lens element having positive refractive power;

a second lens element;

a third lens element;

a fourth lens element;

a fifth lens element with negative refractive power having at least one of an object-side surface and an image-side surface thereof being aspheric, and having at least one inflection point thereof; and

a sixth lens element;

wherein an Abbe number of the sixth lens element is V 6 , an axial distance between an object-side surface of the first lens element and an image surface is TL, a focal length of the image capturing lens system is f, an axial distance between the first lens element and the second lens element is T 12 , an axial distance between the second lens element and the third lens element is T 23 , an axial distance between the third lens element and the fourth lens element is T 34 , an axial distance between the fourth lens element and the fifth lens element is T 45 , an axial distance between the fifth lens element and the sixth lens element is T 56 , a maximum axial distance among T 12 , T 23 , T 34 ,T 45 and T 56 is T 45 , and the following conditions are satisfied:

V 6<30; and

0.85< TL/f< 1.10.

12. The image capturing lens system of claim 11 , wherein a maximum refractive index among the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element is Nmax, and the following condition is satisfied:

N max<1.70.

13. The image capturing lens system of claim 11 , wherein the focal length of the image capturing lens system is f, a curvature radius of the image-side surface of the fifth lens element is R 10 , and the following condition is satisfied:

1.0< f/R 10.

14. The image capturing lens system of claim 11 , wherein an entrance pupil diameter of the image capturing lens system is EPD, a maximum image height of the image capturing lens system is ImgH, and the following condition is satisfied:

0.70<EPD/Img H< 1.50.

15. The image capturing lens system of claim 11 , wherein the focal length of the image capturing lens system is f, an axial distance between an image-side surface of the sixth lens element and the image surface is BL, an axial distance between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, and the following conditions are satisfied:

4.0 [mm]< f< 12.0 [mm]; and

0< BL/TD< 0.40.

16. An image capturing lens system, comprising six lens elements, the six lens elements being, in order from an object side to an image side:

a first lens element having positive refractive power;

a second lens element having negative refractive power;

a third lens element;

a fourth lens element;

a fifth lens element with negative refractive power having at least one of an object-side surface and an image-side surface thereof being aspheric, and having at least one inflection point thereof; and

a sixth lens element having positive refractive power;

wherein an axial distance between an object-side surface of the first lens element and an image surface is TL, a focal length of the image capturing lens system is f, and the following condition is satisfied:

0.85< TL/f< 1.10.

17. The image capturing lens system of claim 16 , wherein a vertical distance between a critical point on the image-side surface of the fifth lens element and an optical axis is Yc 52 , the focal length of the image capturing lens system is f, and the following condition is satisfied:

0.05< Yc 52/ f< 0.50.

18. The image capturing lens system of claim 16 , wherein an entrance pupil diameter of the image capturing lens system is EPD, a maximum image height of the image capturing lens system is ImgH, and the following condition is satisfied:

0.70<EPD/Img H< 1.50.

19. The image capturing lens system of claim 16 , wherein an axial distance between the first lens element and the second lens element is T 12 , an axial distance between the second lens element and the third lens element is T 23 , an axial distance between the third lens element and the fourth lens element is T 34 , an axial distance between the fourth lens element and the fifth lens element is T 45 , an axial distance between the fifth lens element and the sixth lens element is T 56 , and a maximum axial distance among T 12 , T 23 , T 34 ,T 45 and T 56 is T 45 .

20. The image capturing lens system of claim 16 , wherein the axial distance between the object-side surface of the first lens element and the image surface is TL, the focal length of the image capturing lens system is f, and the following condition is satisfied:

0.85< TL/f≤ 1.0.

21. An image capturing lens system, comprising six lens elements, the six lens elements being, in order from an object side to an image side:

a first lens element with positive refractive power having an object-side surface being convex thereof;

a second lens element having negative refractive power;

a third lens element;

a fourth lens element;

a fifth lens element with negative refractive power having at least one of an object-side surface and an image-side surface thereof being aspheric, and at least one inflection point thereof; and

a sixth lens element having positive refractive power;

wherein a focal length of the image capturing lens system is f, a curvature radius of the object-side surface of the first lens element is R 1 , an axial distance between an image-side surface of the sixth lens element and an image surface is BL, an axial distance between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, and the following conditions are satisfied:

3.10< f/R 1<7.50; and

0< BL/TD< 0.40.

22. The image capturing lens system of claim 21 , wherein a maximum refractive index among the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element is Nmax, and the following condition is satisfied:

N max<1.70.

23. The image capturing lens system of claim 21 , wherein an entrance pupil diameter of the image capturing lens system is EPD, a maximum image height of the image capturing lens system is ImgH, and the following condition is satisfied:

0.70<EPD/Img H< 1.50.

24. The image capturing lens system of claim 21 , wherein a vertical distance between a critical point on the image-side surface of the fifth lens element and an optical axis is Yc 52 , the focal length of the image capturing lens system is f, and the following condition is satisfied:

0.05< Yc 52/ f< 0.50.

25. The image capturing lens system of claim 21 , further comprising an aperture stop disposed between an imaged object and the object-side surface of the first lens element.

26. An image capturing lens system, comprising six lens elements, the six lens elements being, in order from an object side to an image side:

a first lens element with positive refractive power having an object-side surface being convex thereof;

a second lens element;

a third lens element;

a fourth lens element;

a fifth lens element with negative refractive power having an image-side surface being concave thereof, at least one of an object-side surface and the image-side surface thereof being aspheric, and at least one inflection point thereof; and

a sixth lens element;

wherein a focal length of the image capturing lens system is f, a curvature radius of the object-side surface of the first lens element is R 1 , an axial distance between the fourth lens element and the fifth lens element is T 45 , an axial distance between the fifth lens element and the sixth lens element is T 56 , and the following conditions are satisfied:

3.10< f/R 1<7.50; and

T 56/ T 45<0.60.

27. The image capturing lens system of claim 26 , wherein object-side surfaces and image-side surfaces of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element are all aspheric, a half of the maximal field of view of the image capturing lens system is HFOV, and the following condition is satisfied:

0<tan(2*HFOV)<1.0.

28. The image capturing lens system of claim 26 , wherein a vertical distance between a critical point on the image-side surface of the fifth lens element and an optical axis is Yc 52 , the focal length of the image capturing lens system is f, and the following condition is satisfied:

0.05< Yc 52/ f< 0.50.

29. The image capturing lens system of claim 26 , wherein an entrance pupil diameter of the image capturing lens system is EPD, a maximum image height of the image capturing lens system is ImgH, and the following condition is satisfied:

0.70<EPD/Img H< 1.50.

30. The image capturing lens system of claim 26 , wherein the focal length of the image capturing lens system is f, a maximum refractive index among the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element is Nmax, and the following condition is satisfied:

4.0 [mm]< f< 12.0 [mm]; and

N max<1.70.

31. The image capturing lens system of claim 26 , wherein a focal length of the first lens element is f 1 , a focal length of the second lens element is f 2 , a focal length of the third lens element is f 3 , a focal length of the fourth lens element is f 4 , a focal length of the fifth lens element is f 5 , a focal length of the sixth lens element is f 6 , and the following condition is satisfied:

| f 1|<| f 3|; | f 1|<| f 4|; | f 1|<| f 6|;

| f 2|<| f 3|; | f 2|<| f 4|; | f 2|<| f 6|;

| f 5|<| f 3|; | f 5|<| f 4|; and | f 5|<| f 6|.

32. The image capturing lens system of claim 26 , wherein the axial distance between the fifth lens element and the sixth lens element is T 56 , the axial distance between the fourth lens element and the fifth lens element is T 45 , an axial distance between the object-side surface of the first lens element and an image surface is TL, a vertical distance between a maximum effective diameter position on an image-side surface of the sixth lens element and an optical axis is Y 62 , a vertical distance between a maximum effective diameter position on the object-side surface of the first lens element and the optical axis is Y 11 , and the following conditions are satisfied:

T 56< T 45; and

5.5< TL /( Y 62− Y 11)<12.0.

33. An image capturing apparatus, comprising the image capturing lens system of claim 26 and an image sensor disposed on an image surface of the image capturing lens system.

34. An electronic device, comprising the image capturing apparatus of claim 33 .