Zoom optical system with a vibration correction function and imaging device using the zoom optical system

A zoom optical system with a vibration correction function comprising, arranged along an optical axis in order from the object side as follows:

• a first lens group having positive refractive power and that is stationary during zooming;
• a second lens group having negative refractive power and that moves along the optical axis during zooming;
• a third lens group having positive refractive power that includes a stop and that moves along the optical axis during zooming;
• and
• a fourth lens group that is stationary during zooming;
• wherein
• said first lens group includes, arranged along the optical axis in order from the object side, a lens element having negative refractive power, a prism for bending the optical axis, and at least one lens element having positive refractive power;
• and
• at least part of said fourth lens group is movable in a direction that intersects the optical axis in order to correct for blurring of an image due to vibration of the zoom optical system.

A zoom optical system with a vibration correction function comprising, arranged along an optical axis in order from the object side as follows:

• a first lens group having positive refractive power and that is stationary during zooming;
• a second lens group having negative refractive power and that moves along the optical axis during zooming;
• a third lens group having positive refractive power that includes a stop and that is stationary during zooming;
• a fourth lens group having positive refractive power that moves along the optical axis during zooming;
• and
• a fifth lens group that is stationary during zooming;
• wherein
• said first lens group includes, arranged along the optical axis in order from the object side, a lens element having negative refractive power, a prism for bending the optical axis, and at least one lens element having positive refractive power;
• and
• at least part of said third lens group is movable in a direction that intersects the optical axis in order to correct for blurring of an image due to vibration of the zoom optical system.

A zoom optical system with a vibration correction function comprising, arranged along an optical axis in order from the object side as follows:

• a first lens group having positive refractive power and that is stationary during zooming;
• a second lens group having negative refractive power and that moves along the optical axis during zooming;
• a third lens group having positive refractive power that includes a stop and that is stationary during zooming;
• a fourth lens group having positive refractive power that moves along the optical axis during zooming;
• and
• a fifth lens group that does not move along the optical axis during zooming;
• wherein
• said first lens group includes, arranged along the optical axis in order from the object side, a lens element having negative refractive power, a prism for bending the optical axis, and at least one lens element having positive refractive power;
• and
• at least part of said fifth lens group is movable in a direction that intersects the optical axis in order to correct for blurring of an image due to vibration of the zoom optical system.