Depth of field (Hyperfocal distance)
In optics, particularly as it relates to film and photography, depth of field is the distance between the nearest and farthest objects in a scene that appear acceptably sharp in an image.
The hyperfocal distance is the nearest focus distance at which the Depth of field extends to infinity; focusing the camera at the hyperfocal distance results in the largest possible depth of field for a given f-number.The hyperfocal distance is related to the lens focal length, the lens f-number and the circle of confusion for a given image format.
|H||The hyperfocal distance (mm)|
|f||The lens focal length (mm)|
|N||The lens f-number (dimensionless)|
|c||The circle of confusion (mm)|