| 摘要 |
A lens barrel capable of shortening its full length includes a photo-taking optical system with a rear unit lens and a front unit lens, a rear unit lens holding cylinder holding the rear unit lens, a front unit lens holding cylinder holding the front unit lens and movable in the direction of an optical axis relative to the rear unit lens between a photographing position for making the photo-taking optical system capable of photographing with the rear unit lens and a full length shortening position for shortening the full length of the lens barrel in the direction of the optical axis and a fixing member for fixing the front unit lens holding cylinder in one of the aforementioned positions relative to the rear unit lens holding cylinder.
|
