| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact and light-weight zoom lens that can provide bright images in the entire variable magnification area, effectively corrects aberrations over the entire variable magnification area to maintain high optical performance, and includes resolution power that can be applied to a solid state imaging device with high pixels.SOLUTION: The present zoom lens is configured by arranging, in order from an object side, a first lens group Ghaving a positive refractive power, a second lens group Ghaving a negative refractive power, a third lens group Ghaving a positive refractive power, a fourth lens group Ghaving a positive refractive power, and a fifth lens group Ghaving a negative refractive power. The fifth lens group Gis configured by arranging, in order from the object side, two single lenses of a negative lens L(first lens), and a positive lens L(second lens) with an aspherical surface formed on both sides. Both an increase in aperture ratio and an increase in resolution power can be achieved by satisfying predetermined conditions. |
