| 摘要 |
<p>An image pickup lens includes: a first lens having a positive refracting power; an aperture stop for adjusting an amount of light entering the image pickup lens; a second lens having a concave face directed to an object side and having a negative refracting power; a third lens having a concave face directed to the object side and having a positive refracting power; and a fourth lens having a negative refracting power; the first lens, the aperture stop, the second lens, the third lens, and the fourth lens being disposed in order from the object side.</p> |
