Focus set to infinity — all objects from the hyperfocal distance appear sharp; ideal for landscape and astro shoots.
Technical Details
The hyperfocal distance determines the close limit of sharpness at infinity focus. With a 35mm lens on full frame and aperture f/8, sharpness begins as close as 3.5 meters. Wide-angle lenses (14-24mm) achieve hyperfocal distances of 0.8 to 2.1 meters at f/8, while telephoto lenses (85-200mm) only provide continuous sharpness from 15-80 meters. Cine lenses use mechanical stops on the focus ring, while photo lenses can often focus beyond the infinity mark to compensate for thermal expansion.
History & Development
The concept emerged with the first landscape photographers of the 1860s, who required maximum depth of field. Leica introduced the first infinity mark on the focus ring in 1925. In the 1950s, Angenieux developed precise stops for cine lenses, allowing focus pullers to operate them blindly for the first time. Modern digital systems since 2010 supplement mechanical markings with electronic focus maps displaying millimeter-accurate distance readings.
Practical Application in Film
Western films like "The Good, the Bad and the Ugly" (1966) utilized infinity focus for landscape shots with sharp foregrounds and backgrounds. Roger Deakins systematically employs hyperfocal distances in exterior shots for "1917" (2019) to ensure constant sharpness during long, unbroken takes. Action sequences benefit from infinity focus as follow focus operators have less to adjust. For handheld shots, this setting eliminates focus problems caused by unpredictable movements.
Comparison & Alternatives
In contrast to selective focus, which isolates individual planes of focus, infinity focus keeps all image elements sharp. Split diopters achieve similar results at shorter focal lengths but require precise positioning of the focus transition. Focus stacking combines multiple shots for extreme depth of field but only works with static subjects. Deep focus achieves similar results through small apertures (f/11-f/16) but significantly reduces the amount of light and requires stronger illumination.