| 摘要 |
PROBLEM TO BE SOLVED: To achieve a size reduction and also ensure satisfactory optical performance including imaging performance.SOLUTION: A zoom lens comprise, in order from an object side to an image side, a first lens group of negative refractive power, a second lens group of positive refractive power, a third lens group of negative refractive power, and a fourth lens group of positive refractive power. The second lens group comprises in order from the object side to the image side, a front group of positive refractive power and a rear group of positive refractive power. The front group includes, in order from the object side to the image side, a positive lens, a positive lens, a negative lens, and positive lens. The rear group has at least one positive lens. |
