Abstract: A photographing optical system includes eight lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. The eight lens elements each have an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has positive refractive power. The fifth lens element has positive refractive power. The object-side surface of the seventh lens element is convex in a paraxial region thereof. The image-side surface of the eighth lens element is concave in a paraxial region thereof. At least one lens surface of at least one lens element of the photographing optical system has at least one critical point in an off-axis region thereof.

Abstract: A photographing optical lens assembly includes eight lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. Each of the eight lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The first lens element has positive refractive power. The object-side surface of the fifth lens element is concave in a paraxial region thereof. The image-side surface of the sixth lens element is concave in a paraxial region thereof. The object-side surface of the seventh lens element is convex in a paraxial region thereof. The image-side surface of the eighth lens element is concave in a paraxial region thereof.

Abstract: An optical image capturing lens assembly includes six lens elements, the six lens elements being, in order from an object side to an image side: a first lens element with negative refractive power, a second lens element with positive refractive power, a third lens element with negative refractive power, a fourth lens element with positive refractive power, a fifth lens element, and a sixth lens element with negative refractive power.

Abstract: An image system lens assembly includes three lens groups including five lens elements. The three lens groups are, in order from an object side to an image side: first, second and third lens groups. The five lens elements are, in order from the object side to the image side: first, second, third, fourth and fifth lens elements. A zooming process is performed by changing axial distances between the three lens groups. The image system lens assembly has a long focal length end and a short focal length end. At least one surface of at least one lens element has an inflection point in an optically effective area thereof when the image system lens assembly is at the long focal length end and the short focal length end. The second lens group is moved relative to the first lens group along an optical axis in the zooming process.

Abstract: An optical photographing lens assembly includes nine lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element and a ninth lens element. Each of the nine lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one lens element of the optical photographing lens assembly has at least one aspheric lens surface having at least one inflection point.

Abstract: A photographing optical lens assembly includes eight lens elements, the eight lens elements being, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. Each of the eight lens elements has an object-side surface facing towards the object side and an image-side surface facing towards the image side. At least one surface of the object-side surface and the image-side surface of at least one lens element of the photographing optical lens assembly is aspheric and includes at least one inflection point.

Abstract: An image lens assembly includes six lens elements, and the six lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. Each of the six lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The first lens element with negative refractive power has the image-side surface being concave in a paraxial region thereof. The second lens element has negative refractive power. At least one surface of at least one of the six lens elements includes at least one inflection point.

Abstract: An electronic device includes at least one optical lens assembly. The optical lens assembly includes four lens elements, and the four lens elements are, in order from an outside to an inside, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has an outside surface being convex in a paraxial region thereof. The second lens element has an inside surface being convex in a paraxial region thereof. The fourth lens element has an inside surface being concave in a paraxial region thereof, wherein at least one of an outside surface and the inside surface of the fourth lens element includes at least one critical point in an off-axis region thereof.

Abstract: An imaging optical lens assembly includes five lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. Each of the five lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The third lens element has positive refractive power. At least one of the object-side surface and the image-side surface of at least one of the five lens elements includes at least one critical point in an off-axis region thereof.

Abstract: An optical photographing lens assembly includes nine lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element and a ninth lens element. Each of the nine lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one lens element of the optical photographing lens assembly has at least one aspheric lens surface having at least one inflection point.

Abstract: An imaging lens assembly includes, in order from an object side to an image side along an optical path: a first lens element through an eighth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The second lens element has an object-side surface being convex in a paraxial region thereof. The fifth lens element has positive refractive power. The sixth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The seventh lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The eighth lens element has negative refractive power. At least one lens surface of the imaging lens assembly has at least one critical point in an off-axis region thereof.

Abstract: An imaging optical lens system includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element, in order from an object side to an image side along an optical path. The first lens element has an object-side surface being concave in a paraxial region thereof. The fourth lens element has negative refractive power. The fifth lens element has positive refractive power. At least one lens surface of at least one lens element of the imaging optical lens system has at least one critical point in an off-axis region thereof.

Abstract: An image capturing optical system includes ten lens elements which are, in order from an object side to an image side along an optical path: a first lens element having positive refractive power, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element, a ninth lens element and a tenth lens element having negative refractive power. Each of the ten lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The image-side surface of the second lens element is concave in a paraxial region thereof. At least one of the object-side surface and the image-side surface of at least one lens element of the image capturing optical system has at least one critical point in an off-axis region thereof.

Abstract: An imaging optical lens assembly includes four lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element and a fourth lens element. Each of the four lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one of all lens surfaces of the four lens elements is aspheric and has at least one inflection point.

Abstract: A projection lens system includes two lens elements being, in order from a magnification side to a reduction side along an optical path, a first lens element, and a second lens element. Each of the two lens elements has a magnification-side surface facing the magnification side and a reduction-side surface facing the reduction side. At least one of the magnification-side surface and the reduction-side surface of at least one of the two lens elements is aspheric.

Abstract: An optical imaging system includes five lens elements, the five lens elements being, in order from an object side to an image side: a first lens element having positive refractive power; a second lens element having negative refractive power; a third lens element having positive refractive power; a fourth lens element having positive refractive power; and a fifth lens element having negative refractive power.

Abstract: A photographing optical lens system includes seven lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each of the seven lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The object-side surface of the sixth lens element is concave in a paraxial region thereof, and the image-side surface of the sixth lens element is convex in a paraxial region thereof. At least one of the object-side surface and the image-side surface of at least one lens element of the photographing optical lens system has at least one inflection.

Abstract: An image capturing optical system includes ten lens elements which are, in order from an object side to an image side along an optical path: a first lens element having positive refractive power, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element, a ninth lens element and a tenth lens element having negative refractive power. Each of the ten lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The image-side surface of the second lens element is concave in a paraxial region thereof. At least one of the object-side surface and the image-side surface of at least one lens element of the image capturing optical system has at least one critical point in an off-axis region thereof.

Abstract: An electronic device includes at least one optical lens system. The optical lens system includes five lens elements, and the five lens elements are, in order from an outside to an inside, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. At least one of outside surfaces and inside surfaces of the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element is aspheric and includes at least one inflection point.

Abstract: An optical image capturing lens assembly includes six lens elements, the six lens elements being, in order from an object side to an image side: a first lens element with negative refractive power, a second lens element with positive refractive power, a third lens element with negative refractive power, a fourth lens element with positive refractive power, a fifth lens element, and a sixth lens element with negative refractive power.