Camera optical lens

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

• a first lens, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens, a fifth lens and a sixth lens having a negative refractive power;
• wherein the camera optical lens further satisfies the following conditions:
• f2≤0;
• 0≤f3;
• 0.5≤f1/f≤10;
• 1.7≤n2≤2.2;
• 1.7≤n3≤2.2;
• 0.025≤d3/TTL≤0.2;
• where
• f:
• the focal length of the camera optical lens;
• f1:
• the focal length of the first lens;
• f2:
• the focal length of the second lens;
• f3:
• the focal length of the third lens;
• n2:
• the refractive power of the second lens;
• n3:
• the refractive power of the third lens;
• d3:
• the thickness on-axis of the second lens;
• TTL:
• the total optical length of the camera optical lens.