Note the distance on the scale. Focus on the nearest thing, and note its distance on the scale. Turn the focus ring until each distance is equally far from the center index, and you'll see that each distance lies next to the same aperture number on different sides of the scale. Depth-of-Field scale, Leica 40mm f/2. enlarge. And you'll read
The depth of field, and thus hyperfocal distance, changes with the focal length as well as the f-stop. This lens is set to the hyperfocal distance for f /32 at a focal length of 100 mm. In optics and photography, hyperfocal distance is a distance from a lens beyond which all objects can be brought into an "acceptable" focus.
To get more mathematical, if you're using a 50mm lens at f/1.8 and photographing something at 4 feet, your depth of field will be around 1.5 inches deep. But if you photograph that same subject from 10 feet, you will have a depth of field of just under 10 inches deep. Shot at 2ft with a 35mm lens at f/1.4. Shot at 9ft with a 35mm lens at f/1.4.
The hyperfocal distance is defined as the focus distance which places the furthest edge of a depth of field at infinity. If one were to focus any closer than this — if even by the slightest amount — then a distant background will appear unacceptably soft. Alternatively, if one were to focus any farther than this, then the most distant
The Depth Of Field component applies a depth of field effect, which simulates the focus properties of a camera lens. In real life, a camera can only focus sharply on an object at a specific distance. Objects nearer or farther from the camera are out of focus. The blurring gives a visual cue about an object's distance, and introduces "bokeh Distance to the point of focus. Ratio of the aperture (known as f-stop or f-number). The smaller the value is, the shallower the depth of field is. Distance between the lens and the film. The larger the value is, the shallower the depth of field is. Calculate the focal length automatically from the field-of-view value set on the camera. MODaC.
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    • depth of field distance