Setting Hyperfocal Distances
For any lens that does not have a depth-of-field scale, hyperfocal distances can be calculated manually for any focal length and aperture combination by using the formula:
H = f2 / F (0.033)
where "H" is the hyperfocal distance in mm, "f" is the focal length, and "F" is the aperture.
For example, with a 50mm lens set at f/8, H = 50x50 / 8 x 0.033, so H is 9470mm (9.47 meters or approximately 31 feet). Setting the focus on the lens to this distance will render subjects from half this distance to infinity acceptably sharp.