depth of field

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depth of field

For a given setting of an optical system (or a steady state of accommodation of the eye) it is the distance over which an object may be moved without causing a sharpness reduction beyond a certain tolerable amount. Depth of field increases when the diaphragm (or pupil) diameter diminishes as, for example, in old eyes (Fig. D1). Examples: viewing at infinity, the depth of field ranges between infinity and about 3.6 m for a pupil of 4 mm in diameter; and between infinity and about 2.3 m for a 2 mm pupil. At a viewing distance of 1 m, the depth of field ranges from about 1.4 m to 80 cm with a 4 mm pupil; and from about 1.8 m to 70 cm with a 2 mm pupil. See hyperfocal distance.
Fig. D1 Schematic representation of the depth of field and the depth of focus of an eye fixating an object at O (I, retinal image size corresponding to the tolerable resolution)enlarge picture
Fig. D1 Schematic representation of the depth of field and the depth of focus of an eye fixating an object at O (I, retinal image size corresponding to the tolerable resolution)
References in periodicals archive ?
For a different type of shot of boat fishermen, preset your camera to the correct shutter speed, f-stop, and distance, and hold it out over the water to shoot back toward the boat as a fellow angler casts or lands a fish.
Then the display goes north of the Tyne to f-Stop Gallery in Byker, Newcastle, where it can be viewed from June 23 to August 5.
I had to put myself on a strict photo training regimen--taking notes, shooting tons of test rolls and buckling down to figure out exactly what the "F" of an F-stop was.
He had a concussion from a brick thrown at him during the melee between Chinese protesters and soldiers, and he'd borrowed the film in his camera, and his f-stop setting was wrong for the film he was using, and he was exhausted and horrified by two days of murder and mayhem in the world's largest public square, where students protesting China's junta were being mangled and trampled by the army.
When photographing from behind tinted glass, they should remember that they will lose at least one f-stop (i.
Kodak Professional's proprietary Extended Range Imaging Technology provides two f-stop exposure latitude in JPEG workflow.
The Vari-Focal TV5513 for 1/3" cameras features an f-stop of f-1.
The camera features manual focus and shutter controls, six shooting modes and 13 f-stop aperture control settings, as well as a multiple exposure mode and histogram display like the ones found on Fujifilm's advanced digital SLR camera, the FinePix S1 Pro.
The focus range is 36 inches to infinity, the f-stop is 2.
Start by making the exposure indicated by the camera's light meter, then make another exposure a half f-stop over the indicated exposure and another one a half f-stop under.
Sometimes there is as much as a two f-stop difference because the filter blocks out some light.
Famous landmarks snapped by Steve Mayes, including the Angel of the North, Druridge Bay in Northumberland, Bamburgh Castle, Holy Island and the Baltic are on sale at the F-Stop Gallery, on Stepney Bank, Newcastle.