| 摘要 |
PURPOSE: A zoom lens is provided to implement magnifying with the least number of lens by configuring a compact optical system. CONSTITUTION: A first lens group(I) has plus refractive power, and comprises a first lens, a second lens, and a third lens. A second lens group(II) has minus refractive power, and comprises a fourth lens, a fifth lens, and a sixth lens. A third lens group(III) has the plus refractive power, and comprises a seventh lens, an eighth lens, and a ninth lens. A fourth lens group(IV) has the plus refractive power, and comprises a tenth non-spherical lens. |
