Abstract: The imaging lens consists of, in order from the object side, a first positive lens group, a stop, a second positive lens group, and a third negative lens group. The first lens group includes a negative lens which has a concave surface on the image side, and two positive lenses which are disposed to be closer to the image side than the negative lens and which have respective convex surfaces on the object side, convex surfaces on the object side. The second lens group includes an aspheric lens, and two sets of cemented lenses disposed to be closer to the image side than the aspheric lens. The third lens group consists of one lens component.

Abstract: A zoom lens includes a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a fifth lens group in order from an object side. In a case of zooming, an interval with an adjacent lens group is changed. The third lens group includes two positive lenses consecutively arranged in order from a side closest to the object side to an image side. The fifth lens group consists of a negative meniscus lens having a concave surface toward the object side and a positive lens having a convex surface toward the object side in order from the object side to the image side.

Abstract: Provided are an imaging apparatus, an imaging method, and a program that can directly determine a sensor position at which an image with good image quality is obtained from obtained image information. The imaging apparatus moves an image sensor to a plurality of sensor positions in the optical axis direction of an imaging lens, and focuses a subject at each of the plurality of sensor positions. Image data of the subject focused at each of the plurality of sensor positions is acquired, and the image data is analyzed to calculate an image evaluation value at each of the plurality of sensor positions.

Abstract: The image displayable eyeglasses include: a first transmissive optical element 13 that transmits an image of a subject and is capable of changing a refractive power; and a second transmissive optical element 13 that displays or reflects an image using an image signal and transmits the image of the subject. The image displayable eyeglasses are capable of switching between an image display mode, in which the image is displayed or reflected by the second transmissive optical element 12 so as to be incident on eyes of a wearer of the eyeglass body, and an eyeglass mode, in which the image of the subject transmitted through the first transmissive optical element 12 and the second transmissive optical element 13 is incident on the eyes of the wearer. The first transmissive optical element 12 is disposed closer to the wearer than the second transmissive optical element 13.

Abstract: The imaging lens comprises, successively in order from the object side, a positive first lens group that does not move during focusing, a second lens group that moves during focusing, a stop, and a positive third lens group that consists of all lenses moving integrally with the second lens group during focusing. The composite focal length of the second lens group and the third lens group is positive. The first lens group includes four or more positive lenses and three or more negative lenses. The imaging lens satisfies predetermined conditional expressions.

Abstract: A finder display unit displays a live view image based on a captured image generated by an imaging unit. A digital signal processing unit detects a movement vector between frames in the live view image for a predetermined portion in the captured image. A digital signal processing unit changes a display range of the live view image on the finder display unit based on the detected movement vector of a peripheral portion in the captured image.

Abstract: There are provided a lens, a zoom lens, and an imaging lens capable of eliminating blurriness of a ring zone without reducing resolution and increasing the number of steps of processing. A lens 1 has random unevenness within an optical effective diameter D of an optical surface 2, an arithmetic mean roughness Ra within the optical effective diameter D of the optical surface 2 is 20 nm or more and 50 nm or less, and an average value of widths W of protrusion portions 3 of the unevenness on an average line C2 of a roughness curve C1 of the optical surface 2 is 1/200 or more and 1/50 or less of the optical effective diameter D of the optical surface 2. The lens 1 is suitably used as a lens that composes a zoom lens or an imaging lens.

Abstract: The imaging lens includes, in order from the object side, a first lens group that remains stationary during focusing; a diaphragm; and a positive second lens group that moves to the object side during focusing from a long range to a close range. The first lens group includes, in order from the object side: a negative meniscus lens that has an absolute value of a radius of curvature of an image side surface smaller than that of an object side surface, a negative lens, a positive lens, and a negative lens. The second lens group includes five or less lenses, and includes: a positive Z lens that is formed continuously in order from a most image side; a negative Y lens that has an absolute value of a radius of curvature of an object side surface smaller than that of an image side surface; and a positive X lens.

Abstract: The imaging lens includes, in order from the object side, a first lens group that remains stationary during focusing; a diaphragm; and a positive second lens group that moves to the object side during focusing from a long range to a close range. The second lens group includes a positive Z lens that is formed continuously in order from a most image side, a negative Y lens that has an absolute value of a radius of curvature of an object side surface smaller than an absolute value of a radius of curvature of an image side surface, a positive X lens, and a negative W lens that has an absolute value of a radius of curvature of an image side surface smaller than that of an object side surface. The imaging lens satisfies a conditional expression about of the radii of curvature of the X lens and the W lens.

Abstract: A variable magnification optical system consists of, in order from an object side, a first optical system remaining stationary during changing magnification and a second optical system including a plurality of lens groups moving during changing magnification. The first optical system includes a first mirror and a second mirror having reflective surfaces arranged to face each other. The first mirror has a reflective surface concave toward the object side. The second mirror has a reflective surface convex toward the image side. An intermediate image is formed between the second mirror and the second optical system. Predetermined conditional expressions relating to the partial dispersion ratios of the lenses included in the second optical system are satisfied.

Abstract: A variable magnification optical system consists of, in order from an object side, a first optical system remaining stationary during changing magnification and a second optical system including a plurality of lens groups moving during changing magnification. The first optical system includes a first mirror and a second mirror having reflective surfaces arranged to face each other. The first mirror is an optical element having a power at a position closest to the object side on an optical path and has a reflective surface concave toward the object side. The second mirror has a reflective surface convex toward the image side. An intermediate image is formed between the second mirror and the second optical system.

Abstract: The image displayable eyeglasses include: a first transmissive optical element 13 that transmits an image of a subject and is capable of changing a refractive power; and a second transmissive optical element 13 that displays or reflects an image using an image signal and transmits the image of the subject. The image displayable eyeglasses are capable of switching between an image display mode, in which the image is displayed or reflected by the second transmissive optical element 12 so as to be incident on eyes of a wearer of the eyeglass body, and an eyeglass mode, in which the image of the subject transmitted through the first transmissive optical element 12 and the second transmissive optical element 13 is incident on the eyes of the wearer. The first transmissive optical element 12 is disposed closer to the wearer than the second transmissive optical element 13.

Abstract: The variable magnification optical system includes, in order from an object side, a positive first lens group disposed at a position closest to the object side, a variable magnification lens group which is disposed at a position closest to the object side among negative lens groups and moves during changing magnification, an intermediate group including at least one lens group, and a positive final lens group which is disposed at a position closest to the image side. The variable magnification lens group, the intermediate group, and the final lens group are continuously disposed. The variable magnification optical system includes at least one LA lens. This LA lens satisfies predetermined conditional expressions relating to a refractive index, an Abbe number, and a partial dispersion ratio, and is located from the variable magnification lens group to the intermediate group.

Abstract: The imaging lens consists of, in order from an object side: a first lens group G1; a diaphragm; and a second lens group G2 that has a positive refractive power. The first lens group G1 consists of, in order from the object side, a first A lens group G1A that consists of two negative meniscus lenses concave toward an image side, and a first B lens group G1B that consists of only one positive lens or a negative lens and a positive lens. The second lens group G2 consists of, in order from the object side, a biconvex lens, a biconcave lens, one or two biconvex lenses, and a negative meniscus lens that is concave toward the object side. With such a configuration, the imaging lens satisfies predetermined conditional expressions.

Abstract: Provided are a rear converter lens and an imaging apparatus capable of achieving favorable optical performance and an appropriate back focal length with high magnification. The rear converter lens RCL consists of, in order from the object side, four lens-groups of positive, negative, negative, and positive lens-groups. In order from the object side, a first lens-group RG1 consists of a negative lens RL11 and a positive lens RL12, a second lens-group RG2 consists of a negative lens RL21 and a positive lens RL22, a third lens-group RG3 consists of a negative lens RL31, a positive lens RL32, and a negative lens RL33, and a fourth lens-group RG4 consists of a biconvex lens RL41 and a negative lens RL42. Here, 0.22<cf/f12<1 is satisfied, where f12 is a composite focal length of the first lens-group RG1 and the second lens-group RG2, and cf is a focal length of the rear converter lens RCL.

Abstract: An imaging lens is constituted by, in order from the object side to the image side: a first lens group; a stop; and a second lens group having a positive refractive power. The first lens group is constituted by, in order from the object side to the image side: one or two negative meniscus lenses, a biconcave lens, and a biconvex lens. The second lens group is constituted by, in order from the object side to the image side: a 2A lens group having a positive refractive power as a whole, constituted by a positive lens, a negative lens, and a positive lens; and a 2B lens group having a positive refractive power as a whole, constituted by a positive lens, a negative lens, and a positive lens. A predetermined conditional formula is satisfied.

Abstract: The imaging lens consists of a first lens group G1, an aperture stop St, and a positive second lens group G2, in order from an object side. The first lens group G1 consists of a 1-1st negative meniscus lens L11 with its convex surface toward the object side, a 1-2nd negative lens L12 with its concave surface toward an image side, a 1-3rd positive lens L13 having a biconvex shape, a 1-4th negative meniscus lens L14 with its convex surface toward the object side, and a 1-5th positive lens L15 with its convex surface toward the object side, in order from the object side. Predetermined conditional expressions are satisfied which relate to a focal length of the whole system, a focal length of the first lens group G1, and a distance on an optical axis between the 1-4th negative meniscus lens L14 and the 1-5th positive lens L15.

Abstract: Provided are an imaging lens, which has a small F number and in which various aberrations are satisfactorily corrected, and an imaging apparatus including the imaging lens. The imaging lens includes, in order from an object side: a first lens that has a biconcave shape; a second lens that is convex toward an image side and has a positive refractive power; a third lens that has a biconvex shape; a fourth lens that has a negative refractive power; a fifth lens that has a positive refractive power; and a sixth lens that has a negative refractive power. Assuming that L1f and L1r are paraxial radii of curvature of an object side surface and an image side surface of the first lens, Conditional Expression (1) is satisfied. 0.1<(L1f+L1r)/(L1f?L1r)<0.

Abstract: The imaging lens includes a first lens group fixed during focusing and a positive second lens group moving to an object side during focusing from a long-distance object to a short-distance object, in order from a side closest to the object. The field curvature is adjusted by moving the first lens group or a sub-lens group within the first lens group including a lens closest to the object side, as an adjustment group. A stop fixed during the adjustment of the field curvature is disposed closer to an image side than the adjustment group. Conditional expressions relating to the focal length of the whole system, the focal length of the adjustment group, and the height of a paraxial on-axis light ray in the adjustment group are satisfied.

Abstract: An imaging lens is constituted by, in order from the object side to the image side: a first lens group; a stop; and a second lens group having a positive refractive power. The first lens group is constituted by, in order from the object side to the image side: a 1-1 negative meniscus lens having a concave surface toward the image side; a 1-2 negative meniscus lens having a concave surface toward the image side; a 1-3 biconcave lens; and a 1-4 positive lens. The second lens group is constituted by, in order from the object side to the image side: a 2A lens group having a positive refractive power; and a 2B lens group having a positive refractive power as a whole, constituted by a 2B-1 positive lens, a 2B-2 negative lens, and a 2B-3 positive lens. Predetermined conditional formulae are satisfied.