Camera optical lens

A camera optical lens comprising eight lenses which are, from an object side to an image side in sequence:

• a first lens having a positive refractive power;
• a second lens having a positive refractive power;
• a third lens having a positive refractive power;
• a fourth lens having a negative refractive power;
• a fifth lens having a negative refractive power;
• a sixth lens having a positive refractive power;
• a seventh lens having a negative refractive power;
• and
• an eighth lens having a negative refractive power;
• wherein the camera optical lens satisfies conditions of:
• 0.95=f/TTL;
• 3.00≤f2/f≤4.50;
• 1.90≤d5/d4≤3.00, and
• 0.20≤(R5+R6)/(R5−R6)≤0.90;
• 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;
• 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;
• d4 denotes an on-axis distance from an image-side surface of the second lens to the object-side surface of the third lens;
• and
• d5 denotes an on-axis thickness of the third lens.