Electronic imaging apparatus
AssigneeOlympus Corporation
InventorMasaru Morooka
Life of this patent
Estimating the term…
Abstract
An electronic imaging apparatus of the present invention comprises a photographing optical system, in order from an object side, a first lens group having negative refracting power, which has a reflecting component having a reflecting surface for bending an optical path of an incident light from the object side and at least two positive lens groups arranged at an image side of the first lens group, wherein the photographing optical system is a zoom optical system and the following condition is satisfied: −1.75<f1/fw<−0.8 where f1 is a focal length of the first lens group, and fw is a focal length at the wide angle end at the photographing optical system.
Claims39
An ectronic imaging apparatus comprising,
- a photographing optical system comprising,
- in order from an object side,
- a first lens group having negative refracting power, which contains a reflecting component having a reflecting surface for bending an optical path of an incident light from the object side, and
- at least two positive lens groups having positive refracting power, arranged at an image side of the first lens group,
- wherein the photographing optical system is a zoom optical system, and
- wherein the following condition is satisfied:
- −1.75<f1/fw<−0.8
- where f1 is a focal length of the first lens group, and fw is a focal length at a wide angle end at the photographing optical system.
An electronic imaging apparatus comprising,
- a photographing optical system comprising,
- in order from an object side,
- a first lens group having negative refracting power, which contains a reflecting component having a reflecting surface for bending an optical path of an incident light from the object side, and
- at least two positive lens groups having positive refracting power, arranged at an image side of the first lens group,
- wherein the photographing optical system is a zoom optical system, and
- wherein a thickness of each lens on the optical axis, which is contained in the photographing optical system is 1/7 or more than a diagonal length of an imaging surface.
An electronic imaging apparatus comprising,
- a photographing optical system comprising,
- in order from an object side,
- a first lens group having negative refracting power, which includes a reflecting component having a reflecting surface for bending an optical path of an incident light from the object side, and
- at least two positive lens groups having positive refracting power, arranged at an image side of the first lens group, wherein the following condition is satisfied:
- −0.7<f1/fT<−0.3
- where f1 is a focal length of the first lens group, and fT is a focal length of the photographing optical system and it is a focal length at the telephoto end of the photographing optical system when the focal length is variable.
Dependencies are inferred from the claim text.