Patent ID: 9632289
Date: 2017-04-25
CPC Classifications: G02B

Claim:
1. A macro lens system, consisting of, in this order from an object side: a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; a fifth lens group having a positive refractive power; and a sixth lens group having a negative refractive power; the first lens group consisting essentially of three lenses; and the second lens group, the fourth lens group, and the fifth lens group being independently moved in the direction of the optical axes thereof when focusing from an object at infinity to an object at a most proximate distance, wherein the macro lens system satisfies Conditional Formula (5) below, wherein f denotes the focal length when focused on an object at infinity, and f3 denotes the focal length of the third lens group.