Abstract: A zoom lens system is provided that includes a compactly constructed focusing lens unit and that has a suppressed change in the image magnification at the time of movement of a focusing lens unit. The zoom lens system according to the present invention comprises a plurality of lens units and an aperture diaphragm arranged in the lens unit. The plurality of lens units include a focusing lens unit that is arranged on an object side relative to the aperture diaphragm and that moves in a direction along the optical axis at the time of focusing. Further, the zoom lens system satisfies at least one of the following conditions: (1) 1.2<|fF/fW|<6.0; and (2) 0.10<|fF/fT|<1.8 (here, fT/fW>3.0, fF: a focal length of the focusing lens unit, fT: a focal length of the entire system at a telephoto limit, fW: focal length of the entire system at a wide-angle limit).

Abstract: An exposure apparatus projects a pattern of an original onto a substrate by a projection optical system to expose the substrate, wherein the projection optical system includes a mirror assembly, and the mirror assembly includes a first mirror member which has a first reflecting surface and is configured to bend an optical axis of the projection optical system, a second mirror member which has a second reflecting surface and is configured to bend the optical axis, a supporting mechanism configured to support the first mirror member and the second mirror member, and the supporting mechanism is positioned to position the first mirror member and the second mirror member while a positional relationship between the first mirror member and the second mirror member is maintained.

Abstract: Provided is a zoom lens system including a compact focusing lens unit and having a suppressed change in image magnification at the time of movement of the focusing lens unit. The zoom lens system of the present invention includes, in order from an object side to an image side, a first lens unit G1 having negative optical power, a second lens unit G2 having positive optical power, a third lens unit G3 having positive optical power, and a fourth lens unit G4 having negative optical power. The fourth lens unit G4 moves to the image side along an optical axis at the time of focusing from an infinity in-focus condition to a close-point in-focus condition.

Abstract: A camera body includes an imaging element, a hot shoe, and a camera controller. The imaging element is configured to convert an optical image of the subject into an electrical signal, and is configured to produce image data about the subject. The hot shoe allows the flash device to be mounted. The camera controller is configured to calculate an evaluation value on the basis of the image data produced by the imaging element, and is configured to perform video autofocusing on the basis of this evaluation value. The camera controller is configured to control the imaging element and the flash device so that when the camera controller decides that auxiliary light is needed, and the camera controller decides that the external auxiliary light source of the flash device mounted to the hot shoe is not compatible with video autofocusing, the image data is acquired while an external main light source of the flash device intermittently emits light during the video autofocusing.

Abstract: A zoom lens system is provided that includes a compactly constructed focusing lens unit and that has a suppressed change in the image magnification at the time of movement of a focusing lens unit and further that can compensate an image blur caused by vibration applied to the entire system. The zoom lens system according to the present invention comprises a plurality of lens units and an aperture diaphragm arranged in the lens unit.

Abstract: A zoom lens system is provided that includes a compactly constructed focusing lens unit and that has a suppressed change in the image magnification at the time of movement of a focusing lens unit. The zoom lens system according to the present invention, in order from an object side to an image side, comprises: a first lens unit having positive optical power; a second lens unit having negative optical power; a third lens unit having positive optical power; and an aperture diaphragm. At the time of zooming, the zoom lens system moves the first to third lens units so that intervals between these lens units vary. At the time of focusing from an infinity in-focus condition to a close-point object in-focus condition, the zoom lens system moves the third lens unit to the object side.

Abstract: A compact and lightweight zoom lens system having excellent imaging performance, which is favorably applicable to an interchangeable-lens type digital camera system, is provided. The zoom lens system of the present invention includes, a first lens unit having positive optical power and arranged closest to an object side, a focusing lens unit that moves along an optical axis from an infinity in-focus condition to a close-object in-focus condition, an image blur compensation sub-lens unit that includes at least one lens element and that moves in a direction perpendicular to the optical axis, and an aperture diaphragm arranged on an image side relative to the focusing lens unit and the image blur compensation sub-lens unit. The focusing lens unit, the image blur compensation sub-lens unit, and the aperture diaphragm are adjacent with one another. Further, the following condition (8) is satisfied: 0.7<BFW/fW<3.

Abstract: A compact and lightweight zoom lens system having excellent imaging performance, which is favorably applicable to an interchangeable-lens type digital camera system, is provided. The zoom lens system of the present invention includes, in order from an object side to an image side, a first lens unit having positive optical power and composed of not more than two lens elements, a second lens unit having negative optical power, a third lens unit having negative optical power, and a fourth lens unit having positive optical power. In zooming from a wide-angle limit to a telephoto limit, the fourth lens unit moves along an optical axis. Further, the following condition (9) and (10) are satisfied: 1.50<nd1<1.72, 50<vd1<75 (nd1: a refractive index to the d line of a positive lens element constituting the first lens unit, vd1: an Abbe number of a positive lens element constituting the first lens unit).

Abstract: A compact and lightweight zoom lens system having excellent imaging performance, which is favorably applicable to an interchangeable-lens type digital camera system, is provided. The zoom lens system of the present invention includes, in order from an object side to an image side, a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having negative optical power, a fourth lens unit having positive optical power and including at least one resin lens, and an aperture diaphragm arranged in the fourth lens unit. In zooming from a wide-angle limit to a telephoto limit, an interval between the third lens unit and the fourth lens unit monotonically decreases. Further, the following condition (1) is satisfied: 1.0<T4/fW<3.5 (T4: a thickness of the fourth lens unit in an optical axis direction, fW: a focal length of the entire system at a wide-angle limit).

Abstract: A digital camera comprises an interchangeable lens unit and a camera body. The interchangeable lens unit is provided to form an optical image of a subject. A flash memory is configured to hold a correction coefficient table used to electrically correct distortion produced by the optical system. The camera body has a CCD image sensor, a correction coefficient acquisition part, an operation part, and a correction processor. The correction coefficient acquisition part is configured to acquire the correction coefficient table held in the flash memory. The operation part is configured to produce correction data by performing an interpolation operation or an extrapolation operation on the information obtained from the correction coefficient table. The correction processor is configured to correct distortion in the image data on the basis of information produced by the operation part.

Abstract: A zoom lens system is provided that includes a compactly constructed focusing lens unit and that has a suppressed change in the image magnification at the time of movement of a focusing lens unit. The zoom lens system according to the present invention comprises a plurality of lens units and an aperture diaphragm arranged in the lens unit. The plurality of lens units include: a negative lens unit that is arranged on an object side relative to the aperture diaphragm and provided with negative optical power having an absolute value greatest in the entire system and that moves in a direction along an optical axis at the time of zooming; and a focusing lens unit that is arranged in an optical path between the negative lens unit and the aperture diaphragm and that moves in a direction along the optical axis at the time of focusing such that an interval relative to the negative lens unit should vary.

Abstract: An object of the present invention is to provide: a zoom lens system that has a high resolution, high capability of compensating curvature of field, a high zoom ratio of, for example, 3 or greater, a reduced weight, and a reduced overall optical length at the time of non-use; and an imaging device and a camera that employ this zoom lens system so as to have a reduced thickness and excellent portability as well as high performance. The zoom lens system forms an optical image of an object with variable magnification and, in order from the object side to the image side, comprises: a first lens unit having negative optical power; a second lens unit that has positive optical power and that contains a bi-convex lens element composed of a resin material and serving as the most image side lens element; and a third lens unit having positive optical power.

Abstract: Compact and lightweight zoom lens systems having less aberration fluctuation in association with focusing, lens barrels, interchangeable lens apparatuses, and camera systems are provided. The zoom lens system comprises: a first lens unit having positive optical power; a first focusing lens unit which is located on an image side relative to the first lens unit, has negative optical power, and moves along an optical axis in zooming and focusing; and a second focusing lens unit which is located on the image side relative to the first focusing lens unit, has positive optical power, and moves along the optical axis in the zooming and the focusing, and satisfies the condition: |d2T/d1T|<1.0 (d1T: an amount of movement of the first focusing lens unit in focusing at a telephoto limit, d2T: an amount of movement of the second focusing lens unit in focusing at a telephoto limit).

Abstract: A zoom lens system comprising a plurality of lens units, wherein a lens unit located closest to an object side has positive optical power, among lens units located on the image side relative to an aperture diaphragm, a lens unit having negative optical power is at least one focusing lens unit which moves along an optical axis in focusing, an image blur compensating lens unit is provided, which moves in a direction perpendicular to the optical axis, in order to optically compensate image blur, the image blur compensating lens unit and the at least one focusing lens unit are arranged adjacent to each other, and the condition: 0.1<(T1+T2)/H<2.0 (T1 is an axial thickness of the lens unit located closest to the object side, T2 is an axial thickness of a lens unit located having one air space toward the image side from the lens unit located closest to the object side, H is an image height) is satisfied; an interchangeable lens apparatus; and a camera system are provided.

Abstract: A zoom lens system comprising a plurality of lens units, each lens unit comprising at least one lens element, wherein a lens unit located closest to an object side has negative optical power, in zooming from a wide-angle limit to a telephoto limit at the time of image taking, the lens unit located closest to the object side and a lens unit located closest to an image side are fixed relative to an image surface, the lens unit located closest to the object side includes at least one lens element having positive optical power and at least one lens element having negative optical power, and an image blur compensating lens unit is provided, which moves in a direction perpendicular to an optical axis, in order to optically compensate image blur; an interchangeable lens apparatus; and a camera system are provided.

Abstract: An object of the present invention is to provide a highly-accurate AF without adding a mechanism of the camera or increasing the power consumption. A solid-state imaging device according to an aspect of the present invention includes: a plurality of photoelectric conversion units configured to convert incident light into electronic signals, the photoelectric conversion units being arranged in a two dimensional array, the photoelectric conversion units including a plurality of first photoelectric conversion units and a plurality of second photoelectric conversion units; a plurality of first microlenses each of which is disposed to cover a corresponding one of said first photoelectric conversion units; and a second microlens disposed to cover the second photoelectric conversion units, in which at least two of the second photoelectric conversion units are located at respective positions which are offset from an optical axis of the second microlens, in mutually different directions.

Abstract: An object of the present invention is to provide: a zoom lens system that has a high resolution, high capability of compensating curvature of field, a high zoom ratio of, for example, 3 or greater, a reduced weight, and a reduced overall optical length at the time of non-use; and an imaging device and a camera that employ this zoom lens system so as to have a reduced thickness and excellent portability as well as high performance. The zoom lens system forms an optical image of an object with variable magnification and, in order from the object side to the image side, comprises: a first lens unit having negative optical power; a second lens unit that has positive optical power and that contains a bi-convex lens element composed of a resin material and serving as the most image side lens element; and a third lens unit having positive optical power.

Abstract: A zoom lens system is provided that includes a compactly constructed focusing lens unit and that has a suppressed change in the image magnification at the time of movement of a focusing lens unit. The zoom lens system, in order from an object side to an image side, comprises at least: a first lens unit having positive optical power; a second lens unit having negative optical power; a third lens unit having negative optical power; and an aperture diaphragm. At the time of zooming, the zoom lens system moves the first to third lens units so that intervals between these lens units vary. At the time of focusing from an infinity in-focus condition to a close-point object in-focus condition, the zoom lens system moves the third lens unit to the object side.

Abstract: Provided is a zoom lens system including a compact focusing lens unit and having a suppressed change in image magnification at the time of movement of the focusing lens unit. A zoom lens system of the present invention, in order from an object side to an image side, includes, a first lens unit G1 having negative optical power, a second lens unit G2 having positive optical power, a third lens unit G3 having positive optical power, and a fourth lens G4. Condition (10): 1.4<DL/YM<2.5 and condition (11): 1.2<BFW/YM<1.6 are satisfied (where, 100<2?W<140, DL is an effective diameter of the lens surface closest to the image side, BFW is the back focus at a wide-angle limit, YM is the maximum image height at a wide-angle limit, and ?W is a half view angle (°) at a wide-angle limit).

Abstract: A zoom lens system comprising a plurality of movable lens units which individually move along an optical axis at the time of zooming, wherein a lens unit located closest to an object side is fixed relative to an image surface at the time of zooming, at least two of the movable lens units are focusing lens units which move along the optical axis at the time of focusing in at least one zooming position, and the condition: 0.1<T1/fW<1.5 (T1: an axial thickness of the lens unit located closest to the object side, fW: a focal length of the entire system at a wide-angle limit) is satisfied; an interchangeable lens apparatus; and a camera system are provided.