Camera optical lens

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

wherein the camera optical lens satisfies following conditions:

0.95≤f/TTL;

−4.00≤f2/f≤−2.00;

2.00≤d12/d14≤7.50; and

2.50≤(R7+R8)/(R7−R8)≤15.00;

where

f denotes a focal length of the camera optical lens;

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;

f2 denotes a focal length of the second lens;

d12 denotes an on-axis distance from an image-side surface of the sixth lens to an object-side surface of the seventh lens;

d14 denotes an on-axis distance from an image-side surface of the seventh lens to an object-side surface of the eighth lens;

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

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

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

0.60≤f1/f≤2.28;

−9.39≤(R1+R2)/(R1−R2)≤−1.91; and

0.05≤d1/TTL≤0.16;

where

f1 denotes a focal length of the first lens;

R1 denotes a central curvature radius of the 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.

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

1.64≤(R3+R4)/(R3−R4)≤9.23; and

0.02≤d3/TTL≤0.06;

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.

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

0.33≤f3/f≤1.33;

−0.10≤(R5+R6)/(R5−R6)≤0.35; and

0.04≤d5/TTL≤0.14;

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.

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

−14.26≤f4/f≤−0.81; and

0.02≤d7/TTL≤0.08;

where

f4 denotes a focal length of the fourth lens; and

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

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

−3.69≤f5/f≤−0.95;

−0.34≤(R9+R10)/(R9−R10)≤0.10; and

0.02≤d9/TTL≤0.06;

where

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; and

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

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

0.60≤f6/f≤2.30;

−6.85≤(R11+R12)/(R11−R12)≤−2.05; and

0.03≤d11/TTL≤0.10;

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 following conditions:

−2.14≤f7/f≤−0.52;

−1.06≤(R13+R14)/(R13−R14)≤1.04; and

0.04≤d13/TTL≤0.13;

where

f7 denotes a focal length of the seventh lens;

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

R14 denotes a central curvature radius of an image-side surface 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 following conditions:

−106.85≤f8/f≤−3.73;

1.81≤(R15+R16)/(R15−R16)≤48.17; and

0.03≤d15/TTL≤0.10;

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 following conditions:

f/IH≥2.33;

where

IH denotes an image height of the camera optical lens.