Patent ID: 6943958
Filing Date: 2005-09-13
Classification: G02B

Abstract:
1. A zoom lens system comprising, in order from an object side, a first lens group having negative refracting power and a second lens group having positive refracting power, wherein zooming is carried out at least by changing the distance between the groups, and the first lens group comprises six lenses which are, in order from the object side, a first lens which has meniscus form, negative refracting power and a concave surface toward an image side, a second lens which has meniscus form, negative refracting power and a concave surface toward the image side, a third lens which has negative refracting power and a concave surface toward the image side, a fourth lens which has positive refracting power and double convex surfaces, a fifth lens which has negative refracting power, and a sixth lens which has positive refracting power.