Dodging

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Selectively lightening part of a photo with an image editing program.

DPI

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Dots per inch, a measurement of the resolution of a digital photo or digital device, including digital cameras and printers. The higher the number,…

DRAM

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Dynamic Random Access Memory. A type of memory that is volatile – it is lost when the power is turned off.

DRAM Buffer

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All digital cameras  have a certain amount of fixed memory in them to facilitate image processing before the finished picture is stored on the…

DSLR

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Digital SLR camera. Interchangeable lens digital camera.

E-TTL

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Canon’s Evaluative-TTL exposure system that uses a brief pre-flash before the main flash to calculate the exposure index.

EV

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Exposure Value, a very complex thing but in the digicam world it usually means the ability to override the auto exposure system to lighten…

EVF

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Electronic Viewfinder, a small color LCD with a magnified lens that functions as an eye-level viewfinder. Usually found on video camcorders but they have…

EXIF

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Exchangeable Image File,  the file format used by most digital cameras. For example, when a typical camera is set to record a JPEG, it’s…

Existing light

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Available light. Strictly speaking, existing light covers all natural lighting from moonlight to sunshine. For photographic purposes, existing light is the light that is…

Exposure

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The amount of light that reaches the image sensor and is controlled by a combination of the lens aperture and shutter speed.

Exposure Bracketing

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The camera automatically takes a series of 3 or 5 pictures and slightly varies the EV for each frame. This ensures that at least…

Exposure Meter

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An instrument with a light-sensitive cell that measures the light reflected from or falling on a subject, used as an aid for selecting the…

Exposure Modes

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Exposure modes allow photographers more control over the amount of light used to capture images. Automatic Exposure (AE Mode): Will detect light levels and…