The closest point you can focus a lens and still have the depth-of-field including infinity when the lens is focused on infniity. On a NIKKOR lens that does not have a depth-of-field scale, you can calculate the hyperfocal distance by using the formula: H = f 2 / ( F x CoC ) where H is the hyperfocal distance in mm, f is the focal length, F is the aperture and CoC is a Circle of Confusion value (0.033 for 35mm film or an FX format camera or 0.020 for a DX format body). The maximum permissible circle of confusion will vary depending on the image reproduction size, image capture format and other variables.nikongrossary
Technically, it is the distance between the camera and the hyperfocal point (See below). But, in practice, Hyperfocal distance is a lens setting technique that allows you to shoot sharp pictures within a certain distance range (depth of field) without having to refocus.
The nearest point in the scene which is in focus when the lens is focused at infinity. This distance changes according to the focal length of the lens and the aperture at which it is set. Setting a lens at its hyperfocal distance maximizes the depth of field when infinity must be kept sharp.
When the lens is focused on infinity, the nearest point to the camera that is considered acceptably sharp is the Hyperfocal point. By focusing on the hyperfocal point, everything beyond it to infinity remains in acceptable focus, and objects halfway between the camera and the hyperfocal point will also be rendered acceptably sharp.
The closest focus distance at which both objects at infinity and closer objects are in focus.
The hyperfocal distance is a distance set on the focusing ring of the lens that will most efficiently use the Depth of Field present. A depth of field chart will list possible distances and graph out the area of focus at different f-stops. There does not necessarily have to be a subject to focus on at that distance.