| 摘要 |
PURPOSE: A wide angle and compact zoom optics are provided to impellent a lens system with high magnification and wide angle while low costs since the system requires the small number of lens with small size. CONSTITUTION: A compact zoom optical system comprises a first lens group(100-1), a second lens group(200-1), and a third lens group(300-1). The first lens group has the positive refractive power, and a second lens group has a positive refractive power. A third lens group has a positive refractive power. In a wide angle edge, the second lens group moves toward the object side when changing the magnification. The first lens group is comprised of one negative refractive power lens group and one positive refractive power lens. The negative lens group has at least aspheric surface. |
