CPC G02B 13/0035 (2013.01) [G02B 9/12 (2013.01); G02B 13/0055 (2013.01)] | 12 Claims |
1. A camera lens, comprising, in order from an object side to an image side along an optical axis:
a first lens having a positive refractive power;
a second lens having a positive refractive power or a negative refractive power, wherein the second lens a concave object side surface; and
a third lens having a positive refractive power or a negative refractive power which is opposite to the refractive power of the second lens, wherein there are three lenses: the first lens, the second lens, and the third lens, between the object side and the image side;
wherein an equivalent length TL of an actual propagation distance of a principal ray from an object side surface of the first lens to an imaging plane in the air and an entrance pupil diameter EPD of the camera lens satisfy: 3.5<TL/EPD<4.0;
wherein a total effective focal length f of the camera lens satisfies: f≥40 mm;
wherein the total effective focal length f of the camera lens and a maximum semi-field of view Semi-FOV of the camera lens satisfy: f×tan(Semi-FOV)>5.0.
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