Joule

Joule

Unit used to quantify the light output of electronic flash. A joule is equal to one watt second of 40 lumen-seconds. The measure is used to compare flash units in terms of power output.

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Industry/Domain: Photography
Category: Professional photography
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joule

Weather; Meteorology

A unit of energy in the mks system equal to 107 ergs, 1 Watt second, or 0. 2389 calories.

joule

Industrial machinery; Industrial lubricants

A unit of work, energy, or heat. 1J (joule)=1 Nm) (Newton meter).

joule

Astronomy; Mars

The s. I. Unit of energy, work, or quantity of heat. It is the force of one newton acting over a distance of a meter.

joule

Biotechnology; Genetic engineering

(SI symbol: J) The amount of energy needed to apply a force of 1 newton over a distance of 1 metre.

joule (J)

Engineering; Electronic engineering

The SI unit of work. One joule is the work performed when the point of application of one newton is moved one meter in the direction of the applied force.

joule

Physics; General physics

A unit used to measure energy or work. The joule is named after James Prescott Joule.

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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