Lens system, photographing apparatus, and movable object

A photographing apparatus, comprising

• a photographing element;
• and
• a lens system, including, sequentially from an object side:
• a first lens group having a positive refractive power, including:
• a negative meniscus lens that is arranged closest to the object side and includes a convex surface facing the object side, and
• a first cemented lens;
• an aperture diaphragm next to the first cemented lens;
• a second lens group having a positive refractive power, including a second cemented lens arranged next to the aperture diaphragm;
• and
• a third lens group that has a positive refractive power and is movable along a direction of an optical axis as focusing from an object at infinity distance to a closer object, including a single lens, wherein
• the following conditions are satisfied:
• 1.0<L/Y<2.3, and
• 1<f1/f<3, wherein
• L is a distance from a lens surface of the first lens group closest to the object side to a lens surface closest to an image side on the optical axis,
• Y is a maximum image height,
• f1 is a focal length of the first lens group, and
• f is a focal length of the entire lens system.

A movable object, comprising

• a lens system, including, sequentially from an object side:
• a first lens group having a positive refractive power, including:
• a negative meniscus lens that is arranged closest to the object side and includes a convex surface facing the object side, and
• a first cemented lens;
• an aperture diaphragm next to the first cemented lens;
• a second lens group having a positive refractive power, including a second cemented lens arranged next to the aperture diaphragm;
• and
• a third lens group that has a positive refractive power and is movable along a direction of an optical axis as focusing from an object at infinity distance to a closer object, including a single lens, wherein
• the following conditions are satisfied:
• 1.0<L/Y<2.3, and
• 1<f1/f<3, wherein
• L is a distance from a lens surface of the first lens group closest to the object side to a lens surface closest to an image side on the optical axis,
• Y is a maximum image height,
• f1 is a focal length of the first lens group, and
• f is a focal length of the entire lens system.