| 摘要 |
PROBLEM TO BE SOLVED: To reduce ghost flare of such a type that reflected light going back and forth between two lens surfaces reaches an image surface. SOLUTION: This zoom lens is provided with a 1st lens group G1 having a positive focal distance, a 2nd lens group G2 having a negative focal distance, an aperture diaphragm member 7, and provided with a 3rd lens group G3 arranged on the image side of the member 7 and having a positive focal distance or plural lens groups having a positive focal distance as a whole arranged in order from an object side. The 1st lens group G1 is provided with a 1-1st lens 1 being a negative meniscus whose convex surface faces to the object side, a 1-2nd lens 2 being a positive meniscus whose convex surface having large curvature faces to the object side and which is bonded with the lens 1, and a 1-3rd lens 3 being a positive meniscus whose convex surface faces to the object side arranged in order from the object side. A reflection preventing means is formed on the bonded surface of the lenses 1 and 2. |
