Camera optical lens

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

• a first lens having a negative refractive power;
• a second lens having a positive refractive power;
• a third lens;
• a fourth lens having a negative refractive power;
• a fifth lens having a positive refractive power;
• a sixth lens having a positive refractive power;
• and
• a seventh lens having a negative refractive power,
• wherein at least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, or the seventh lens comprises a free-form surface, and
• wherein the camera optical lens satisfies:
• −4.50≤f4/f≤−2.00;
• −3.66≤f1/f≤−1.12;
• −0.36≤(R1+R2)/(R1−R2)≤0.80;
• −3.87≤(R3+R4)/(R3−R4)≤0.01;
• 2.50≤R11/R12≤10.00;
• 0.03≤d1/TTL≤0.20;
• and
• 0.65≤d5/d6≤19.50,
• where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, f4 denotes a focal length of the fourth 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, 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, 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, d1 denotes an on-axis thickness of the first lens, d5 denotes an on-axis thickness of the third lens, d6 denotes an on-axis distance from an image-side surface of the third lens to an object-side surface of the fourth lens, and TTL denotes a total optical length from the object-side surface of the first lens to an image plane of the camera optical lens along an optic axis.