Imaging lens and imaging apparatus
AssigneeFUJIFILM Corporation
InventorMasaru Yonezawa
Life of this patent
Estimating the term…
Abstract
An imaging lens consisting of a front group, a stop, and a rear group. The first and the second lenses from the object side in the front group are a negative meniscus lens with a convex surface on the object side and a negative lens respectively. The first and the second lenses from the image side in the front group are both positive lenses. The rear group is composed of a positive lens, a negative lens, and one or more positive lenses disposed in order from the object side. If the maximum total angle of view when an object at infinity is in focus is taken as 2ω, the imaging lens satisfies a conditional expression, 2ω>130°.
Claims14
An imaging lens, substantially consisting of a front group, a stop, and a rear group disposed in order from the object side, wherein:
- the first and the second lenses from the object side in the front group are a negative meniscus lens with a convex surface on the object side and a negative lens respectively;
- the first and the second lenses from the image side in the front group are both positive lenses;
- the first and the second lenses from the object side in the rear group are a positive lens and a negative lens respectively;
- the rear group includes one or more lenses on the image side of the second lens from the object side, the one or more lenses being both positive lenses;
- and
- the imaging lens satisfies a conditional expression (1) given below:
- 2ω>130° (1)
- where
- 2ω:
- maximum total angle of view when an object at infinity is in focus.
Dependencies are inferred from the claim text.