CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01); G02B 13/04 (2013.01)] | 11 Claims |
1. An optical system comprising:
a first lens having a negative refractive power;
a second lens having a positive refractive power;
a third lens having a positive refractive power;
a fourth lens having a positive refractive power;
a fifth lens having a negative refractive power;
a sixth lens having a positive refractive power; and
a seventh lens having a negative refractive power,
wherein the first to seventh lenses are sequentially disposed in ascending numerical order from an object side of the optical system toward an image side of the optical system, and
53°<ANG/Fno<61° is satisfied, where ANG is a field of view of the optical system and Fno is a constant indicating a brightness of the optical system.
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