Variable focal length lens device

A variable focal length lens device, comprising:

• a variable focal length optical system configured to change a focal length;
• a beam splitter configured to cause passing light to branch into a first branched beam and a second branched beam, the passing light being reflected off an object and passing through the variable focal length optical system;
• at least one image-forming lens configured to condense the passing light before being split by the beam splitter or condense each of the first branched beam and the second branched beam;
• a first image sensor configured to capture an image of the object by receiving the first branched beam condensed;
• and
• a second image sensor configured to capture an image of the object by receiving the second branched beam condensed, wherein
• a first imaging distance and a second imaging distance are different from each other, the first imaging distance being a distance on a first optical axis from the first image sensor to the image-forming lens arranged just in front of the first image sensor, the second imaging distance being a distance on a second optical axis from the second image sensor to the image-forming lens arranged just in front of the second image sensor, and
• wherein the beam splitter is provided between the variable focal length optical system and the first and second image sensors.