Abstract: Provided is an eyepiece optical system including at least three lenses disposed in order from an observation object (Ob) along an optical axis. A final lens disposed closest to an eye point (EP) (corresponds to the third lens (L3) in FIG. 1) is fixed when adjusting the diopter, and the following conditional expressions (1) and (2) are satisfied: 2.2<|fe/fa|<6.0??(1) 0.5<|Re2/fa|<5.0??(2) where fe denotes a focal length of the final lens, fa denotes a focal length of the total eyepiece optical system (EL), and Re2 denotes a radius of curvature of the eye point (EP) side lens surface of the final lens. When an optical surface is aspherical, a paraxial radius of curvature is used for calculation.

Abstract: A variable magnification optical system includes: a first lens group having a positive refractive power and arranged closest to an object; a negative lens group having a negative refractive power and arranged closer to an image than the first lens group; a positive lens group which has a positive refractive power, which includes at least one lens that moves integrally with an aperture stop, and which is arranged closer to the image than the negative lens group; and a focusing group arranged between the negative lens group and the positive lens group, wherein when varying magnification, a distance between the first lens group and the negative lens group is changed, and a distance between the negative lens group and the positive lens group is changed, wherein when focusing, a distance between the focusing group and a lens arranged at a position to face an object-side of the focusing group is changed, and a distance between the focusing group and a lens arranged at a position to face an image-side of the focusin

Abstract: A variable magnification optical system includes: a first lens group (G1) having a positive refractive power and arranged closest to an object; a negative lens group (G2) having a negative refractive power and arranged closer to an image than the first lens group; a positive lens group (G4) which has a positive refractive power, which includes at least one lens that is arranged closer to the image than an aperture stop (S), and which is arranged closer to the image than the negative lens group; and a focusing group (G3) arranged between the negative lens group and the positive lens group, wherein when varying magnification, the first lens group moves with respect to an image plane, a distance between the first lens group and the negative lens group is changed, and a distance between the negative lens group and the positive lens group is changed, wherein when focusing, a distance between the focusing group and a lens arranged at a position to face an object-side of the focusing group is changed, and a distance

Abstract: A variable magnification optical system includes: a first lens group having a positive refractive power and arranged closest to an object; a negative lens group having a negative refractive power and arranged closer to an image than the first lens group; and a focusing group arranged between the negative lens group and an aperture stop, wherein when varying magnification, the distance between the first lens group and the negative lens group is changed, and the distance between the negative lens group and the aperture stop is changed, wherein when focusing, the distance between the focusing group and a lens arranged at a position to face an object-side of the focusing group is changed, and the distance between the focusing group and a lens arranged at a position to face an image-side of the focusing group is changed, wherein the focusing group is constituted by one single lens having a positive refractive power, and a predetermined conditional expression is satisfied.

Abstract: A printing managing apparatus includes: a job attribute correlating information acquiring unit that acquires job attribute correlating information that correlates pieces of individual job attribute information used in plural respective printing control apparatus with common job attribute information for each job attribute that can be set in print job information so as to be common to the plural printing control apparatus as transmission destination candidates of the print job information; an attribute specification information converting unit as defined herein; and a manipulation control processing unit as defined herein.

Abstract: A printing managing apparatus includes: a job attribute correlating information acquiring unit that acquires job attribute correlating information that correlates pieces of individual job attribute information used in plural respective printing control apparatus with common job attribute information for each job attribute that can be set in print job information so as to be common to the plural printing control apparatus as transmission destination candidates of the print job information; an attribute specification information converting unit as defined herein; and a manipulation control processing unit as defined herein.

Abstract: Provided is an eyepiece optical system including, in order from an observation object (Ob): a first lens (L11) having positive refractive power; a second lens (L12) which has negative refractive power and of which an observation object (Ob) side lens surface is concave; and a third lens (L13) which has positive refractive power and of which an eye point (EP) side lens surface is convex. The third lens (L13) is fixed on the optical axis with respect to the observation object (Ob) when adjusting the diopter, and the following conditional expressions are satisfied: 0.65<R31/fe<1.30??(1) ?0.80<(R32+R31)/(R32?R31)<?0.10??(2) where fe denotes a focal length of the eyepiece optical system, R31 denotes a radius of curvature of the observation object (Ob) side lens surface of the third lens (L13), and R32 denotes a radius of curvature of the eye point (EP) side lens surface of the third lens (L13).

Abstract: An eyepiece lens (EL) used for a viewfinder optical system (VF) for viewing, using the eyepiece lens (EL), an image formed by an objective lens (OL), an image displayed by a display member, or an object, wherein an antireflection coating (101) is disposed on at least one surface among the optical surfaces constituting the eyepiece lens (EL), and the antireflection coating (101) includes at least one layer (101g) formed by a wet process.

Abstract: A first carrier rotates integrally with an input shaft. A third sun gear and a fourth sun gear rotate integrally with a first intermediate shaft. A third carrier rotates integrally with a second ring gear. A fourth carrier rotates integrally with a third ring gear, and outputs power. A first clutch couples a first ring gear and a second sun gear to the first intermediate shaft. A second clutch couples the first carrier to a second carrier. A third clutch couples the second carrier to the first intermediate shaft. A first brake brakes rotation of a first sun gear. A second brake brakes rotation of the second ring gear and the third carrier. A third brake brakes rotation of a fourth ring gear.

Abstract: A first carrier rotates integrally with an input shaft. A third sun gear and a fourth sun gear rotate integrally with a first intermediate shaft. A third carrier rotates integrally with a second ring gear. A fourth carrier rotates integrally with a third ring gear, and outputs power. A first clutch couples a first ring gear and a second sun gear to the first intermediate shaft. A second clutch couples the first carrier to a second carrier. A third clutch couples the second carrier to the first intermediate shaft. A first brake brakes rotation of a first sun gear. A second brake brakes rotation of the second ring gear and the third carrier. A third brake brakes rotation of a fourth ring gear.

Abstract: The art has, disposed in order from an object, a first lens group (G1) having positive refractive power, a second lens group (G2) having negative refractive power, a third lens group (G3) having negative refractive power, and a fourth lens group (G4) having positive refractive power, in which zooming is made by varying an air distance between the first lens group (G1) and the second lens group (G2), and the following conditional expression (1) is satisfied: 0.60<f4/fw<1.15??(1) where f4 denotes a focal distance of the fourth lens group (G4), and fw denotes a focal distance of a zoom lens in a wide-angle end state upon focusing on infinity.

Abstract: Providing an eyepiece optical system 10 comprising: an eyepiece system 11; and an optical member 12 having a meniscus shape disposed to an eye side of the eyepiece system 11, the following conditional expression being satisfied: 2.00<|R|/fe<22.00 where fe denotes a focal length of the eyepiece system 11 when a diopter of the eyepiece system 11 is 0 (m?1), and R denotes a radius of curvature of the surface having the meniscus shape, and the optical member 12 with a meniscus shape having a concave surface facing the eye side.

Abstract: An observation optical system for observing an object includes, in order from the object side: a first lens having positive refractive power; a second lens having negative refractive power and a concave surface facing the object side; and a third lens having positive refractive power and a convex surface facing an eyepoint side. An aspherical surface is included on at least one lens surface, and given conditional expressions are satisfied, thereby providing a compact observation optical system having excellent optical performance, a viewfinder equipped with the observation optical system, and a method for manufacturing the observation optical system.

Abstract: An eyepiece lens (EL) used for a viewfinder optical system (VF) for viewing, using the eyepiece lens (EL), an image formed by an objective lens (OL), an image displayed by a display member, or an object, wherein an antireflection coating (101) is disposed on at least one surface among the optical surfaces constituting the eyepiece lens (EL), and the antireflection coating (101) includes at least one layer (101g) formed by a wet process.

Abstract: An ocular optical system EL for observing an image displayed on an image display element Ob has, in order from the image display element Ob: a first lens L1 which is a positive lens; a second lens L2 which is a negative lens having a strong concave surface facing the image display element Ob; and a third lens L3 which is a positive lens having a strong convex surface facing the eye point EP in order to implement both high magnification and size reduction, wherein the first lens L1 is cemented and integrated with the image display element Ob, in order to reduce the size of the ocular optical system EL while ensuring tele-centricity and sufficiently wide luminous flux.

Abstract: Provided is an eyepiece optical system including, in order from an observation object (Ob): a first lens (L11) having positive refractive power; a second lens (L12) which has negative refractive power and of which an observation object (Ob) side lens surface is concave; and a third lens (L13) which has positive refractive power and of which an eye point (EP) side lens surface is convex. The third lens (L13) is fixed on the optical axis with respect to the observation object (Ob) when adjusting the diopter, and the following conditional expressions are satisfied: 0.65<R31/fe<1.30 ??(1) ?0.80<(R32+R31)/(R32?R31)<?0.10 ??(2) where fe denotes a focal length of the eyepiece optical system, R31 denotes a radius of curvature of the observation object (Ob) side lens surface of the third lens (L13), and R32 denotes a radius of curvature of the eye point (EP) side lens surface of the third lens (L13).

Abstract: Provided is an eyepiece optical system including at least three lenses disposed in order from an observation object (Ob) along an optical axis. A final lens disposed closest to an eye point (EP) (corresponds to the third lens (L3) in FIG. 1) is fixed when adjusting the diopter, and the following conditional expressions (1) and (2) are satisfied: 2.2<|fe/fa|<6.0??(1) 0.5<|Re2/fa|<5.0??(2) where fe denotes a focal length of the final lens, fa denotes a focal length of the total eyepiece optical system (EL), and Re2 denotes a radius of curvature of the eye point (EP) side lens surface of the final lens. When an optical surface is aspherical, a paraxial radius of curvature is used for calculation.

Abstract: Providing an eyepiece optical system 10 comprising: an eyepiece system 11; and an optical member 12 having a meniscus shape disposed to an eye side of the eyepiece system 11, the following conditional expression being satisfied: 2.00<|R|/fe<22.00 where fe denotes a focal length of the eyepiece system 11 when a diopter of the eyepiece system 11 is 0 (m?1), and R denotes a radius of curvature of the surface having the meniscus shape, and the optical member 12 with a meniscus shape having a concave surface facing the eye side.

Abstract: An eyepiece lens (EL) used for a viewfinder optical system (VF) for viewing, using the eyepiece lens (EL), an image formed by an objective lens (OL), an image displayed by a display member, or an object, wherein an antireflection coating (101) is disposed on at least one surface among the optical surfaces constituting the eyepiece lens (EL), and the antireflection coating (101) includes at least one layer (101g) formed by a wet process.

Abstract: An ocular optical system EL for observing an image displayed on an image display element Ob has, in order from the image display element Ob: a first lens L1 which is a positive lens; a second lens L2 which is a negative lens having a strong concave surface facing the image display element Ob; and a third lens L3 which is a positive lens having a strong convex surface facing the eye point EP in order to implement both high magnification and size reduction, wherein the first lens L1 is cemented and integrated with the image display element Ob, in order to reduce the size of the ocular optical system EL while ensuring tele-centricity and sufficiently wide luminous flux.