Back focus

Back focus

Distance between the back surface of the lens and the image plane, when the lens is focused at infinity.

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Part of Speech: noun
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Industry/Domain: Photography
Category: Professional photography
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Related terms

back focus

Photography; Professional photography

distance between the back surface of the lens and the image plane, when the lens is focused at infinity.

back focus

Entertainment; Video

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Anthropology; Cultural anthropology

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Anthropology; Cultural anthropology

A chronologically limited cultural unit within a local culture sequence, characterized by sufficient diagnostic traits to set it apart from all other units. A phase is generally ...

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Engineering; Electronic engineering

1. The point at which rays converge. 2. To bring rays to a point of convergence.

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Photography; Professional photography

To adjust the position of the meeting point of the rays of light refracted by the camera lens until the image is clear.

rubber lens-mount gasket

Photography; Professional photography

A flexible rubber gasket that forms a seal between the lens and the camera body.

subject-to-camera distance information

Photography; Professional photography

The data supplied to the camera by the lens indicating the distance from the camera to the subject. This information makes possible advances like 3D Color Matrix Metering II and ...

vignetting

Photography; Professional photography

A loss of brightness or saturation at the periphery of an image; usually not desired, but sometimes used to create a vignette framing the subject at the center of the image.

special effects mode

Photography; Professional photography

A mode in which the user can create artistic results simply by adding special effects to still images and movies. To select an effect, the user rotates the mode dial to EFFECTS ...

still picture

Photography; Professional photography

A photograph (static image) as opposed to a movie (moving picture).

stop-motion

Photography; Professional photography

Generic term for an animation technique which makes static objects appear to move. This is done by recording each movement of the object as an individual frame, when each frame ...

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