Photographing optical lens system, image capturing unit and electronic device

A photographing optical lens system comprising 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, and each of the eight lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

• wherein the image-side surface of the seventh lens element has at least one inflection point, the object-side surface of the eighth lens element has at least one inflection point, the image-side surface of the eighth lens element has at least one inflection point, and the photographing optical lens system further comprises an aperture stop;
• and
• wherein an axial distance between the aperture stop and the image-side surface of the eighth lens element is Sd, an axial distance between the object-side surface of the first lens element and the image-side surface of the eighth lens element is Td, and the following condition is satisfied:
• 0.7
• <
• Sd
• /
• Td
• <
• 1.2
• .