| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact optical system having a small number of lenses, achieving high performance, having a small coma aberration, especially a small sagittal coma aberration, and a small spherical aberration, and to provide an imaging apparatus having the optical system and a manufacturing method of the optical system. <P>SOLUTION: An optical system OS to be mounted on a single-lens reflex camera 1 or the like includes, in order from an object side along an optical axis, a front group GF and a rear group GR having a positive refractive power. The front group GF includes, in order from the object side, a first lens component LFP having a positive refractive power, a second lens component LFN1 having a negative refractive power with its convex surface facing the object side, and a third lens component LFN2 having a negative refractive power. The rear group GR includes, in order from the object side, a first lens component LRN in which a negative lens L21 and a positive lens L22 are joined and its concave surface faces the object side, a second lens component LRP1 having a positive refractive power with its concave surface facing the image side, and a third lens component LRP2 having a positive refractive power. <P>COPYRIGHT: (C)2013,JPO&INPIT |
