Abstract: An electronic device includes: an information offering unit that offers information on joint purchase of a commodity to a plurality of candidates; and an adjuster that performs adjustment about the commodity. Alternatively, an electronic device includes: an information obtainer that obtains information on a purchase commodity or a purchase scheduled commodity of a first group; and an information offering unit that offers information on a commodity relevant to the purchase commodity or the purchase scheduled commodity of the first group to a second group, based on the information obtained by the information obtainer, the second group being different from the first group.

Abstract: To improve the usability of an electronic device, the electronic device includes: a first camera provided to a main unit, a second camera provided to the main unit at a different location form the first camera, a first orientation detection sensor configured to detect an orientation of the main unit, and a control unit configured to carry out image capturing by the first and second cameras depending on a detection result of the first orientation detection sensor.

Abstract: To acquire information related to contents of word-of-mouth information, an electronic device includes: an input unit that accepts an input of a text from a user; an information acquiring unit that acquires information of the user in relation to the input of the text when allowed to acquire the information by the user; and a transmitting unit that transmits the text and the information of the user.

Abstract: In order to acquire suitable information related to an apparatus, an electronic apparatus has a first acquisition unit that acquires usage status of a first apparatus that belongs to a given category, and a second acquisition unit that acquires information about a second apparatus that belongs to the given category and is different from the first apparatus on the basis of the usage status of the first apparatus acquired by the first acquisition unit.

Abstract: A lens system comprises, on a side closest to an object, a first lens component having a positive refractive power and a second lens component having a positive refractive power in order from the object; and on a side closest to an image, a cemented lens constructed by cementing together a positive lens and a negative lens in order from the object; wherein the lens system satisfies the following conditional expressions: (n1+n2)/2>1.49 (?1+?2)/2>60 where n1 and ?1 denote a refractive index and an Abbe number of the first lens component at d-line, respectively, and n2 and ?2 denote a refractive index and an Abbe number of the second lens component at d-line, respectively.

Abstract: The present invention provides a zoom lens ZL comprising a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, and a fourth lens group G4 having positive refractive power, the first lens group G1 including a negative meniscus lens L11 and a positive meniscus lens L12, the second lens group G2 including a negative meniscus lens L21, a biconcave negative lens L22 and a positive meniscus lens L23, and the fourth lens group G4 including one positive lens L41, and the refractive indexes of at least three lenses in the zoom lens ZL being greater than 1.9.

Abstract: A lens system has the following components in order from an object side: one negative lens component; a positive lens component; a negative lens component having a concave surface of a large curvature on an image side; an aperture stop; a negative lens component having a concave surface of a large curvature on the object side; and a positive lens component; the lens system satisfies a condition of the following expression: 0.75<SF1<1.60, where SF1=(R1+R2)/(R1?R2), and where R1 is a radius of curvature of an object-side lens surface of the negative lens component located nearest to the object side, R2 is a radius of curvature of an image-side lens surface thereof, and SF1 is a shape factor thereof.

Abstract: The present invention provides a zoom lens ZL comprising a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, and a fourth lens group G4 having positive refractive power, the first lens group G1 including a negative meniscus lens L11 and a positive meniscus lens L12, the second lens group G2 including a negative meniscus lens L21, a biconcave negative lens L22 and a positive meniscus lens L23, and the fourth lens group G4 including one positive lens L41, and the refractive indexes of at least three lenses in the zoom lens ZL being greater than 1.9.

Abstract: A lens system comprises, on a side closest to an object, a first lens component having a positive refractive power and a second lens component having a positive refractive power in order from the object; and on a side closest to an image, a cemented lens constructed by cementing together a positive lens and a negative lens in order from the object; wherein the lens system satisfies the following conditional expressions: (n1+n2)/2>1.49 (?1+?2)/2>60 where n1 and ?1 denote a refractive index and an Abbe number of the first lens component at d-line, respectively, and n2 and ?2 denote a refractive index and an Abbe number of the second lens component at d-line, respectively.

Abstract: Providing a zoom lens system having excellently correcting various aberrations with accomplishing to be compact, lightweight, and slim upon being retracted. The system is composed of, in order from an object, a first group having negative refractive power, and a second group having positive refractive power. Upon zooming from a wide-angle end state to a telephoto end state, a distance between the first group and the second group varies. The first group is composed of two lens elements which are, in order from the object, a negative lens having a concave surface facing an image, and a positive lens. The second group consists of three lens elements or less and includes, in order from the object, a positive lens, an aperture stop for defining an f-number, and a negative lens component including a negative lens and disposed to the image side of the aperture stop. Given conditions are satisfied.

Abstract: A lens system has the following components in order from an object side: one negative lens component; a positive lens component; a negative lens component having a concave surface of a large curvature on an image side; an aperture stop; a negative lens component having a concave surface of a large curvature on the object side; and a positive lens component; the lens system satisfies a condition of the following expression: 0.75<SF1<1.60, where SF1=(R1+R2)/(R1?R2), and where R1 is a radius of curvature of an object-side lens surface of the negative lens component located nearest to the object side, R2 is a radius of curvature of an image-side lens surface thereof, and SF1 is a shape factor thereof.

Abstract: Providing a zoom lens system having excellently correcting various aberrations with accomplishing to be compact, lightweight, and slim upon being retracted. The system is composed of, in order from an object, a first group having negative refractive power, and a second group having positive refractive power. Upon zooming from a wide-angle end state to a telephoto end state, a distance between the first group and the second group varies. The first group is composed of two lens elements which are, in order from the object, a negative lens having a concave surface facing an image, and a positive lens. The second group consists of three lens elements or less and includes, in order from the object, a positive lens, an aperture stop for defining an f-number, and a negative lens component including a negative lens and disposed to the image side of the aperture stop. Given conditions are satisfied.