Optical imaging system having prism, fixed lens groups, movable lens groups and correction lens group

An optical imaging system, comprising:

• a first fixed lens group comprising lenses having different refractive powers;
• a prism disposed between the lenses of the first fixed lens group;
• a first movable lens group configured to be movable to change an overall focal length;
• a correction lens group configured to move in an optical axis direction or a direction intersecting with the optical axis;
• a second movable lens group configured to be movable to finely adjust the overall focal length;
• and
• a second fixed lens group,
• wherein a distance between the first movable lens group and the correction lens group is longest at a wide angle end and is shortest at a telephoto end,
• wherein a distance between the correction lens group and the second movable lens group is longest at the wide angle end and shortest at the telephoto end,
• wherein the correction lens group consists essentially of two lenses, and
• wherein the second movable lens group includes two lenses each having positive refractive power.

An optical imaging system, comprising:

• a first fixed lens group comprising lenses having different refractive powers;
• a prism disposed between the lenses of the first fixed lens group;
• a first movable lens group configured to be movable to change an overall focal length;
• a correction lens group configured to move in an optical axis direction or a direction intersecting with the optical axis;
• a second movable lens group configure d to be movable to finely adjust the overall focal length;
• and
• a second fixed lens group,
• wherein the first fixed lens group, the first movable lens group, the correction lens group, the second movable lens group, and the second fixed lens group are disposed in this order from an object side toward an image side of the optical imaging system,
• wherein a distance between the first movable lens group and the correction lens group is longest at a wide angle end and is shortest at a telephoto end,
• wherein a distance between the correction lens group and the second movable lens group is longest at the wide angle end and shortest at the telephoto end, and
• wherein the second movable lens group includes two lenses each having positive refractive power.