Abstract: In a production information processing apparatus, a storage device stores a resource shared among a plurality of machines belonging to a predetermined manufacturing area, 4M data information that is time-series data of operating states per unit time of the machines and the resource related to the machines, and a production loss analysis model that defines a criterion for determining a production loss from a combination of the operating states per unit time in the 4M data information, and a processor identifies a production loss of each of the machines to generate production loss information, and combines the production loss information of one of the machines and 4M data information of another of the machines that is different from the machine and shares the resource, using the production loss information and the shared resource, to classify an occurrence factor of the production loss and generate loss occurrence factor information.

Abstract: An optical system includes, in order from an object side to an image side, a front unit having negative refractive power, an aperture stop, and a rear unit having positive refractive power. The front unit includes a plurality of aspheric lenses. A predetermined condition is satisfied.

Abstract: A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, and a fourth lens unit having a positive refractive power. The first lens unit includes a negative lens B1Ln with a concave surface facing the object side. The second lens unit includes at least one negative lens. During zooming from a wide-angle end to a telephoto end, the first lens unit moves, and the fourth lens unit is fixed or moves from the object side to the image side. A predetermined condition is satisfied.

Abstract: An optical system includes a front lens unit, a first focusing unit having a negative refractive power, and a second focusing unit having a negative refractive power in this order from an object side to an image side. The optical system is a single focus optical system. When a focus is shifted from an object at infinity to an object at a short distance, the first focusing unit and the second focusing unit move to change a distance between the first focusing unit and the second focusing unit on an optical axis.

Abstract: An optical system includes a front lens unit with positive refractive power, an intermediate lens unit, and a rear lens unit in order from an object side to an image side. The intermediate lens unit moves to change an interval between the front lens unit and the intermediate lens unit and an interval between the intermediate lens unit and the rear lens unit in focusing from infinity to a close range. The focal length of the front lens unit and the effective diameter of a lens surface closest to the image side in the rear lens unit satisfy a predetermined inequality.

Abstract: An optical system includes a front lens unit, a first focusing unit having a negative refractive power, and a second focusing unit having a negative refractive power in this order from an object side to an image side. The optical system is a single focus optical system. When a focus is shifted from an object at infinity to an object at a short distance, the first focusing unit and the second focusing unit move to change a distance between the first focusing unit and the second focusing unit on an optical axis.

Abstract: A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, and a fourth lens unit having a positive refractive power. The first lens unit includes a negative lens B1Ln with a concave surface facing the object side. The second lens unit includes at least one negative lens. During zooming from a wide-angle end to a telephoto end, the first lens unit moves, and the fourth lens unit is fixed or moves from the object side to the image side. A predetermined condition is satisfied.