| 摘要 |
A lens barrel having an image blur prevention system including an image blur prevention optical system to prevent image blur, and an image blur prevention optical system drive mechanism to move the image blur prevention optical system within a plane that is generally perpendicular to the optical axis of a main optical system. The image blur prevention optical system drive mechanism is arranged around the image blur prevention optical system to most efficiently use the space in the lens barrel. A power transfer shaft, which is connected to a focusing system in the lens barrel, is arranged in parallel to the image blur prevention optical system, and the focusing system is located in front of the image blur prevention optical system so that it does not interfere with the image blur prevention optical system drive mechanism arranged around the image blur prevention optical system. By efficiently using the space in the lens barrel, the assembly and disassembly of the lens barrel is simplified. Further, by preserving space for the image blur prevention optical system, a large lens size may be maintained.
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