| 摘要 |
A zoom lens is disclosed which comprises a front lens group for collecting light as a first group, a magnification varying lens group for varying the magnification of an image as a second group, a compensator lens group for correcting defocussing and performing a focus adjustment as a third group, and a master lens group for allowing an image of an object to be formed on an image pickup plane. In the zoom lens, the compensator lens group is brought into contact with the compensator lens group positioned at the end of a tele photographing side and, with this state, these two lens groups are moved together to a wide photographing side. Thanks to this, in the tele side photography, a close-up picture taking of several cm can be realized.
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