Photographic lens and photographic apparatus including the same
A photographic lens includes, in a sequence from an object to an image plane, a first lens having positive or negative refractive power; a second lens having positive or negative refractive power; a third lens having positive refractive power; a fourth lens having negative refractive power; a fifth lens having positive refractive power; and a sixth lens having negative refractive power. The photographic lens satisfies the following condition: 90°<FOV<160° 0.5< D 1/ D 6<1.0 where FOV is a field of view of the photographic lens, D1 is an effective aperture of the first lens, and D2 is an effective aperture of the sixth lens.
1. A photographic lens comprising, in a sequence from an object to an image plane:
a first lens having negative refractive power;
a second lens having positive refractive power;
a third lens having positive refractive power;
a fourth lens having negative refractive power;
a fifth lens having positive refractive power; and
a sixth lens having negative refractive power;
wherein the zoom lens satisfies the following condition:
90°<FOV<160°
0.5 <D 1 /D 6<0.77
where FOV is a field of view of the photographic lens, D1 is an effective aperture of the first lens, and D6 is an effective aperture of the sixth lens.
2. The photographic lens of claim 1 , wherein the photographic lens satisfies the following condition:
0.0 <|F 1 /F 2|<10.0
where F1 and F2 are a focal length of the first lens and a focal length of the second lens, respectively.
3. The photographic lens of claim 1 , wherein the photographic lens satisfies the following condition:
1.5<Ind2<1.7
where Ind2 is a refractive index of the second lens.
4. The photographic lens of claim 1 , wherein the photographic lens satisfies the following condition:
125°<FOV<160°
where FOV is a field of view of the photographic lens.
5. The photographic lens of claim 1 , wherein the photographic lens satisfies the following condition:
0 <|F 1 /F 2|<1.5
where F1 and F2 are a focal length of the first lens and a focal length of the second lens, respectively.
6. A photographic apparatus comprising:
the photographic lens of claim 1 ; and
an image sensor configured to convert an optical image formed by the photographic lens into an electrical signal.