Abstract: An image capturing optical system includes seven lens elements, the seven 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 and a seventh lens element. An image-side surface of the fifth lens element is convex in a paraxial region thereof. An image-side surface of the sixth lens element is concave in a paraxial region thereof. The seventh lens element has negative refractive power.

Abstract: A photographing lens assembly includes, 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 and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element, the third lens element and the fourth lens element have refractive power. The fifth lens element with negative refractive power has a convex object-side surface and a concave image-side surface, wherein the surfaces thereof are aspheric, and at least one of the surfaces thereof has at least one inflection point thereon. The sixth lens element with negative refractive power has a convex object-side surface and a concave image-side surface, wherein the surfaces thereof are aspheric, and at least one of the surfaces thereof has at least one inflection point.

Abstract: An optical photographing lens assembly includes seven 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 and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The third lens element has positive refractive power. The seventh lens element has an image-side surface being concave in a paraxial region thereof and including at least one convex shape in an off-axis region thereof. An object-side surface and the image-side surface of the seventh lens element are aspheric.

Abstract: A photographing lens assembly includes, 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 and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element, the third lens element and the fourth lens element have refractive power. The fifth lens element with negative refractive power has a convex object-side surface and a concave image-side surface, wherein the surfaces thereof are aspheric, and at least one of the surfaces thereof has at least one inflection point thereon. The sixth lens element with negative refractive power has a convex object-side surface and a concave image-side surface, wherein the surfaces thereof are aspheric, and at least one of the surfaces thereof has at least one inflection point.

Abstract: A photographing lens assembly includes, in order from an object side to an image side: a first, a second, a third, a fourth, a fifth and a sixth lens elements. The first lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof, wherein the object-side surface has at least one convex critical point in an off-axis region thereof. The third lens element has an image-side surface being convex in a paraxial region thereof. The fourth lens element has positive refractive power. The fifth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof, and an image-side surface being convex in a paraxial region thereof. The sixth lens element has an image-side surface being concave in a paraxial region thereof, wherein the image-side surface has at least one convex critical point in an off-axis region thereof.

Abstract: An imaging lens assembly includes five 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 and a fifth lens element. The first lens element has positive refractive power. The second lens element has positive refractive power. The fourth lens element with negative 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, wherein the two surfaces of the fourth lens element are both aspheric. The fifth lens element having an image-side surface being concave in a paraxial region thereof, wherein two surfaces of the fifth lens element are both aspheric, and the image-side surface of the fifth lens element includes at least one convex critical point in an off-axis region thereof.

Abstract: An image capturing optical system includes seven lens elements, the seven 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 and a seventh lens element. An image-side surface of the fifth lens element is convex in a paraxial region thereof. An image-side surface of the sixth lens element is concave in a paraxial region thereof. The seventh lens element has negative refractive power.

Abstract: A lens system includes, 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 and a sixth lens element. The first lens element with negative refractive power has a concave image-side surface in a paraxial region. The second lens element with refractive power has a convex object-side surface in a paraxial region. The third lens element has positive refractive power. The fourth lens element with positive refractive power has an object-side and an image-side surfaces being aspheric. The fifth lens element with negative refractive power has an aspheric concave object-side surface and an aspheric convex image-side surface in a paraxial region. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region with a convex shape in an off-axis region.

Abstract: An imaging lens assembly includes, 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 and a sixth lens element. The first lens element and the fourth lens element have positive refractive power. The second lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof. The fifth lens element has an object-side surface and an image-side surface being both aspheric. The sixth lens element has an image-side surface being concave in a paraxial region thereof, wherein the image-side surface thereof has at least one convex shape in an off-axial region thereof, and an object-side surface and the image-side surface thereof are both aspheric. The imaging lens assembly has a total of six single and non-cemented lens elements.

Abstract: A lens system includes, 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 and a sixth lens element. The first lens element with negative refractive power has a concave image-side surface in a paraxial region. The second lens element with refractive power has a convex object-side surface in a paraxial region. The third lens element has positive refractive power. The fourth lens element with positive refractive power has an object-side and an image-side surfaces being aspheric. The fifth lens element with negative refractive power has an aspheric concave object-side surface and an aspheric convex image-side surface in a paraxial region. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region with a convex shape in an off-axis region.

Abstract: An imaging optical lens assembly includes, 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 and a fifth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region. The second lens element with negative refractive power has an object-side surface being concave in a paraxial region. The third lens element has an object-side surface and an image-side surface being aspheric. The fourth lens element with negative refractive power has an object-side surface being concave and an image-side surface being concave in a paraxial region, wherein the image-side surface has convex shape in an off-axis region, and the two surfaces thereof are aspheric. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being both aspheric.

Abstract: An imaging lens assembly includes, 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 and a sixth lens element. The first lens element and the fourth lens element have positive refractive power. The second lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof. The fifth lens element has an object-side surface and an image-side surface being both aspheric. The sixth lens element has an image-side surface being concave in a paraxial region thereof, wherein the image-side surface thereof has at least one convex shape in an off-axial region thereof, and an object-side surface and the image-side surface thereof are both aspheric. The imaging lens assembly has a total of six single and non-cemented lens elements.

Abstract: A photographing lens assembly includes, 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 and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element, the third lens element and the fourth lens element have refractive power. The fifth lens element with negative refractive power has a convex object-side surface and a concave image-side surface, wherein the surfaces thereof are aspheric, and at least one of the surfaces thereof has at least one inflection point thereon. The sixth lens element with negative refractive power has a convex object-side surface and a concave image-side surface, wherein the surfaces thereof are aspheric, and at least one of the surfaces thereof has at least one inflection point.

Abstract: An imaging optical lens assembly includes, 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 and a fifth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region. The second lens element with negative refractive power has an object-side surface being concave in a paraxial region. The third lens element has an object-side surface and an image-side surface being aspheric. The fourth lens element with negative refractive power has an object-side surface being concave and an image-side surface being concave in a paraxial region, wherein the image-side surface has convex shape in an off-axis region, and the two surfaces thereof are aspheric. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being both aspheric.

Abstract: An image capturing lens assembly includes, 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 having positive refractive power; a fifth lens element having both an object-side surface and an image-side surface being aspheric; and a sixth lens element having both an object-side surface and an image-side surface being aspheric, the image-side surface being concave, and at least one inflection point on the image-side surface. There are a total of six lens elements.

Abstract: A photographing lens assembly includes, 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 and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element, the third lens element and the fourth lens element have refractive power. The fifth lens element with negative refractive power has a convex object-side surface and a concave image-side surface, wherein the surfaces thereof are aspheric, and at least one of the surfaces thereof has at least one inflection point thereon. The sixth lens element with negative refractive power has a convex object-side surface and a concave image-side surface, wherein the surfaces thereof are aspheric, and at least one of the surfaces thereof has at least one inflection point.

Abstract: An imaging optical system includes, 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 and a sixth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The third lens element has an image-side surface being concave in a paraxial region thereof. The fourth lens element has an image-side surface being concave 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, wherein the image-side surface of the sixth lens element includes at least one convex shape in an off-axial region thereof.

Abstract: An imaging optical lens assembly includes, 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 and a fifth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region. The second lens element with negative refractive power has an object-side surface being concave in a paraxial region. The third lens element has an object-side surface and an image-side surface being aspheric. The fourth lens element with negative refractive power has an object-side surface being concave and an image-side surface being concave in a paraxial region, wherein the image-side surface has convex shape in an off-axis region, and the two surfaces thereof are aspheric. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being both aspheric.

Abstract: A lens system includes, 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 and a sixth lens element. The first lens element with negative refractive power has a concave image-side surface in a paraxial region. The second lens element with refractive power has a convex object-side surface in a paraxial region. The third lens element has positive refractive power. The fourth lens element with positive refractive power has an object-side and an image-side surfaces being aspheric. The fifth lens element with negative refractive power has an aspheric concave object-side surface and an aspheric convex image-side surface in a paraxial region. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region with a convex shape in an off-axis region.

Abstract: An image capturing system includes, 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 and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has negative refractive power. The third lens element has positive refractive power. The fourth lens element with negative refractive power has a concave object-side surface and a convex image-side surface, wherein at least one of the object-side surface and the image-side surface of the fourth lens element is aspheric. The fifth lens element with refractive power has a concave image-side surface, wherein at least one of an object-side surface and the image-side surface of the fifth lens element is aspheric, and the fifth lens element has at least one inflection point on the image-side surface thereof.