Image capturing lens system, image capturing unit and electronic device

An image capturing lens system comprising three lens groups, the three lens groups comprising five lens elements, the three lens groups being, in order from an object side to an image side along an optical path, a first lens group, a second lens group and a third lens group, the five lens elements being, in order from the object side to the image side along the optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and each of the five lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

• wherein a total number of lens elements in the image capturing lens system is five, at least one lens element in the first lens group, the second lens group and the third lens group has at least one inflection point in an off-axis region thereof, a focal length of the image capturing lens system is varied by changing axial distances between the three lens groups in a zooming process, the image capturing lens system has a long-focal-length end and a short-focal-length end, and the second lens group is moved relative to the first lens group along an optical axis in the zooming process;
• wherein the third lens element has positive refractive power;
• wherein an Abbe number of one of the five lens elements is Vi, a refractive index of the one of the five lens elements is Ni, a minimum value of Vi/Ni is (Vi/Ni)min, half of a maximum field of view of the image capturing lens system at the short-focal-length end is HFOVS, a maximum distance between an optically effective area of the object-side surface of the first lens element and the optical axis when the image capturing lens system is at the long-focal-length end is Y11L, a maximum distance between an optically effective area of the object-side surface of the first lens element and the optical axis when the image capturing lens system is at the short-focal-length end is Y11S, a maximum distance between an optically effective area of the image-side surface of the fifth lens element and the optical axis when the image capturing lens system is at the long-focal-length end is Y52L, a maximum distance between an optically effective area of the image-side surface of the fifth lens element and the optical axis when the image capturing lens system is at the short-focal-length end is Y52S, an axial distance between the object-side surface of the first lens element and an image surface when the image capturing lens system is at the long-focal-length end is TLL, an axial distance between the object-side surface of the first lens element and the image surface when the image capturing lens system is at the short-focal-length end is TLS, and the following conditions are satisfied:
• 7.5<(Vi/Ni)min<12.3;
• 5.0 degrees<HFOVS<25.0 degrees;
• 0.50<Y11L/Y52L<2.0;
• and
• 0.50<Y11S/Y52S<2.0.
• TLL/TLS−1|<1.0E-2.

An image capturing lens system comprising three lens groups, the three lens groups comprising five lens elements, the three lens groups being, in order from an object side to an image side along an optical path, a first lens group, a second lens group and a third lens group, the five lens elements being, in order from the object side to the image side along the optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and each of the five lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

• wherein a total number of lens elements in the image capturing lens system is five, at least one lens element in the first lens group, the second lens group and the third lens group has at least one inflection point in an off-axis region thereof, a focal length of the image capturing lens system is varied by changing axial distances between the three lens groups in a zooming process, the image capturing lens system has a long-focal-length end and a short-focal-length end, and the second lens group is moved relative to the first lens group along an optical axis in the zooming process;
• wherein the third lens element has positive refractive power;
• wherein an Abbe number of one of the five lens elements is Vi, a refractive index of the one of the five lens elements is Ni, a minimum value of Vi/Ni is (Vi/Ni)min, half of a maximum field of view of the image capturing lens system at the short-focal-length end is HFOVS, a maximum distance between an optically effective area of the object-side surface of the first lens element and the optical axis when the image capturing lens system is at the long-focal-length end is Y11L, a maximum distance between an optically effective area of the object-side surface of the first lens element and the optical axis when the image capturing lens system is at the short-focal-length end is Y11S, a maximum distance between an optically effective area of the image-side surface of the fifth lens element and the optical axis when the image capturing lens system is at the long-focal-length end is Y52L, a maximum distance between an optically effective area of the image-side surface of the fifth lens element and the optical axis when the image capturing lens system is at the short-focal-length end is Y52S, and the following conditions are satisfied:
• 7.5<(Vi/Ni)min<12.3;
• 5.0 degrees<HFOVS<20.0 degrees;
• 0.50<Y11L/Y52L<2.0;
• and
• 0.50<Y11S/Y52S<2.0.