File talk:DOF-ShallowDepthofField.jpg

Text appears to be from Ansel Adams. [1] is close (but slightly different) to the text in the image.

When a lens is focused at infinity, the near limit of depth of field is called the Hyperfocal Distance for that aperture. It can readily be determined by using the scales on the lens barrel: set the focus at infinity and read the hyperfocal distance opposite the index mark for whatever aperture your [sic] using. If you then set the focus for this hyperfocal distance, the depth of field will extend from one half the hyperfocal distance to infinity. For example, an 80mm lens on a medium format camera has a hyperfocal distance at F22 of about 18 feet. If we set the focus at 18 feet, the depth of field at F22 will extend from about 9 feet to infinity. By focusing at the hyperfocal distance, we achieve the maximum depth of field range for any aperture.

It may be better to recreate the image from GFDL'd text (eg. the text of en:depth of field might be appropriate) to avoid problems with it being a derivative work. --Interiot 03:42, 22 January 2007 (UTC)