| 摘要 |
Taking lens device has zoom lens system comprised of plurality of lens units and achieves zooming by varying unit-to-unit distances and image sensor that converts optical image formed by zoom lens system into electrical signal. Zoom lens system comprised of, from the object side, first lens unit having negative optical power, second lens unit having positive optical power, and third lens unit having positive optical power. First, second, and third lens units are each comprised of one lens element, and at least the first and second lens units are moved along the optical axis during zooming. Following conditional formula is fulfilled: 0.2<tW2-3/fW<1.2, where tW2-3 represents optical path length from the most image-side lens surface in second lens unit to the most object-side lens surface in third lens unit at wide-angle end, and fW represents focal length of the entire zoom lens system at wide-angle end.
|
