Camera optical lens

1. A camera optical lens comprising eight lenses, from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens having a positive refractive power, a sixth lens having a negative refractive power, a seventh lens having a positive refractive power, and an eighth lens having a negative refractive power; wherein the camera optical lens satisfies the following conditions:

0.95≤ f/TTL;

−5.00≤ f 2/ f≤− 2.00;

0.58≤ f 5/ f≤ 2.95;

0.56≤( R 9+ R 10)/( R 9− R 10)≤3.07;

0.04≤ d 9/ TTL≤ 0.12; and

−0.90≤( R 13+ R 14)/( R 13− R 14)≤−0.25;

where

TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis;

f denotes a focal length of the camera optical lens;

f2 denotes a focal length of the second lens;

f5 denotes a focal length of the fifth lens;

R9 denotes a central curvature radius of an object-side surface of the fifth lens;

R10 denotes a central curvature radius of an image-side surface of the fifth lens;

d9 denotes an on-axis thickness of the fifth lens;

R13 denotes a central curvature radius of an object-side surface of the seventh lens; and

R14 denotes a central curvature radius of an image-side surface of the seventh lens.

2. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following condition:

0.50≤ d 8/ d 9≤1.60;

where

d8 denotes an on-axis distance from the image-side surface of the fourth lens to the object-side surface of the fifth lens;

d9 denotes an on-axis thickness of the fifth lens.

3. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:

0.26≤ f 1/ f≤ 1.06;

−2.82≤( R 1+ R 2)/( R 1− R 2)≤−0.45; and

0.05≤ d 1/ TTL≤ 0.18;

where

f1 denotes a focal length of the first lens;

R1 denotes a central curvature radius of an object-side surface of the first lens;

R2 denotes a central curvature radius of an image-side surface of the first lens; and

d1 denotes an on-axis thickness of the first lens.

4. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:

1.82≤( R 3+ R 4)/( R 3− R 4)≤12.31; and

0.01≤ d 3/ TTL≤ 0.04;

where

R3 denotes a central curvature radius of an object-side surface of the second lens;

R4 denotes a central curvature radius of an image-side surface of the second lens; and

d3 denotes an on-axis thickness of the second lens.

5. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:

−5.00≤ f 3/ f≤− 0.75;

−0.33≤( R 5+ R 6)/( R 5− R 6)≤2.60; and

0.02≤ d 5/ TTL≤ 0.09;

where

f3 denotes a focal length of the third lens;

R5 denotes a central curvature radius of an object-side surface of the third lens;

R6 denotes a central curvature radius of an image-side surface of the third lens; and

d5 denotes an on-axis thickness of the third lens.

6. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:

−27.13≤ f 4/ f≤ 3.12;

−2.76≤( R 7+ R 8)/( R 7− R 8)≤14.37; and

0.03≤ d 7/ TTL≤ 0.10;

where

f4 denotes a focal length of the fourth lens;

R7 denotes a central curvature radius of an object-side surface of the fourth lens;

R8 denotes a central curvature radius of an image-side surface of the fourth lens; and

d7 denotes an on-axis thickness of the fourth lens.

7. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:

−3.77≤ f 6/ f≤− 0.77;

0.73≤( R 11 +R 12)/( R 11 −R 12)≤8.86; and

0.01≤ d 11/ TTL≤ 0.04;

where

f6 denotes a focal length of the sixth lens;

R11 denotes a central curvature radius of an object-side surface of the sixth lens;

R12 denotes a central curvature radius of an image-side surface of the sixth lens; and

d11 denotes an on-axis thickness of the sixth lens.

8. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:

1.24≤ f 7/ f≤ 5.76; and

0.01≤ d 13/ TTL≤ 0.10;

where

f7 denotes a focal length of the seventh lens; and

d13 denotes an on-axis thickness of the seventh lens.

9. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:

−1.79≤ f 8/ f≤− 0.53;

0.20≤( R 15+ R 16)/( R 15− R 16)≤0.78; and

0.01≤ d 15/ TTL≤ 0.12;

where

f8 denotes a focal length of the eighth lens;

R15 denotes a central curvature radius of an object-side surface of the eighth lens;

R16 denotes a central curvature radius of an image-side surface of the eighth lens; and

d15 denotes an on-axis thickness of the eighth lens.

10. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:

f/IH≤ 2.15,

where

IH denotes an image height of the camera optical lens.