SHORT-DISTANCE PHOTOGRAPHABLE WIDE ANGLE LENS SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a wide angle lens system with high performance in which a field angle excellently correcting various aberration, specifically spherical aberration, image face curvature, and coma-aberration having a viewing angle of around 80 degrees in the deformation floating focus type wide angle lens system relatively moving to an object side for a third lens system while a first lens group and a second lens group reduce mutual group intervals when focusing from infinity to a short distant object by comprising positive or negative first lens groups, a positive second lens group and a negative third lens group in order from the object side. SOLUTION: The wide angle lens system satisfies the following conditional inequality (1). (1) 0.4