Patent ID: 6924938

Claim:
A zoom lens comprising: a first group optical system that has a positive refracting power and does not move with zooming; a second group optical system that has a negative refracting power and moves from an object side toward an image side with zooming from wide-angle side toward telephoto side; a third group optical system that has a positive refracting power and moves from the image side to the object side with zooming from the wide-angle side toward the telephoto side; and a fourth group optical system that has a positive refracting power and does not move with zooming, wherein the first group optical system, the second group optical system, the third group optical system, and the fourth group optical system are sequentially arranged from the object side toward an image side, and the third group optical system includes a triplet lens formed by sequentially bonding a negative lens, a positive lens, and a negative lens.