Camera optical lens

A camera optical lens comprising, from an object side to an image side in sequence:

• a first lens with a positive refractive power having an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region, a second lens with a negative refractive power having an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region, a third lens with a positive refractive power having an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region, a fourth lens with a refractive power having an object side surface being concave in a paraxial region and an image side surface being convex in the paraxial region, a fifth lens with a refractive power, a sixth lens with a refractive power, a seventh lens with a positive refractive power having an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region, and an eighth lens with a negative refractive power having an object side surface being concave in a paraxial region and an image side surface being concave in the paraxial region;
• wherein the camera optical lens satisfies the following conditions:
• 0.85≤f1/f≤1.10;
• 1.00≤d6/d8≤3.00;
• 3.00≤(R11+R12)/(R11−R12)≤20.00;
• and
• d15max/d15 min≤2.20;
• where,
• f:
• a focal length of the camera optical lens;
• f1:
• a focal length of the first lens;
• d6:
• an on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens;
• d8:
• an on-axis distance from the image side surface of the fourth lens to an object side surface of the fifth lens;
• R11:
• a central curvature radius of an object side surface of the sixth lens;
• R12:
• a central curvature radius of an image side surface of the sixth lens;
• d15max:
• a maximum thickness of the eighth lens parallel to an optical axis;
• and
• d15 min:
• a minimum thickness of the eighth lens parallel to the optical axis.