| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain an optical system that can easily obtain a high quality image in the entire image area despite a wide angle of view and can maintain satisfactory optical performance even in preventing vibration. <P>SOLUTION: In an optical system in which a focal distance is shorter than a back focus and lens groups are arranged on an object side and an image side with respect to an aperture stop SP, a vibration-proof lens group Gis is arranged at a position adjacent to the image side of the aperture stop, the vibration-proof lens group Gis moving in a direction including a component in a vertical direction with respect to an optical axis, thereby moving an image position. The optical system appropriately sets the focal distance f of the entire system, the focal distance fis of the vibration-proof lens group, a distance Dis on the optical axis from the aperture stop to the aperture stop side lens face of the vibration-proof lens group, a distance DL on the optical axis from a first lens face on the object side in the infinity of the distance of the object, and D<SB POS="POST">FS</SB>on the optical axis from the aperture stop to a final lens face. <P>COPYRIGHT: (C)2013,JPO&INPIT |
