Hyperfocal calc - is a critical element in any photograph. Have you ever noticed a picture where everything seems to be in focus from the foreground to the horizon? The trick is to use hyperfocus. The September 1996  issue of Popular Photography gives this explanation: Simply put, the hyperfocal distance is the focusing point at

which the lens must be set to provide the maximum depth of field at any

aperture. Hyperfocal scales once were printed on lens barrels but those helps are rare

today. You could use a hyperfocal depth chart or remember the mathmatical

equation. freeware.