Macro lens, and camera comprising the same
AssigneeOlympus Corporation
InventorHideyasu Takato
Life of this patent
Estimating the term…
Abstract
The invention relates to a fast macro lens that is well corrected for aberrations even at close range, and a camera comprising the macro lens. The macro lens comprises, in order from its object side, a first lens group G1 having positive power and a second lens group G2 having positive power. In the first lens group G1 a negative meniscus lens component concave on its object side is located nearest to the object side of the macro lens. Upon focusing from an object point at infinity to the closest object point, the first G1 and the second lens group G2 move independently toward the object side of the macro lens while the spacing between them varies.
Claims26
A macro lens, which comprises, in order from an object side thereof, a first lens group having positive power and a second lens group having positive power, wherein in said first lens group a negative meniscus lens component concave on an object side thereof is located nearest to an object side of said first lens group, and upon focusing from an object point at infinity to a closest object point, said first lens group and said second lens group move independently toward the object side of the macro lens while a spacing therebetween varies.
A macro lens, which comprises, in order from an object side thereof, a first lens group having positive power, a second lens group having negative power and a third lens group having positive power, wherein in said first lens group a negative meniscus lens component concave on an object side thereof is located nearest to an object side of the first lens group, and upon focusing from an object point at infinity to a closest object point, the lens groups move independently toward the object side of the macro lens while a spacing between adjacent lens group varies.
Dependencies are inferred from the claim text.