Page 187 - (DK) Advanced Photography Guide

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remote release A cable or infrared sync speed The fastest shutter wide-angle lens A lens with an
accessory that fires a camera’s shutter speed that can be used when a angle of view greater than 65 degrees.
without you having to physically flash is attached to the camera. zoom lens A type of lens with
press the shutter button.
telephoto lens A lens with a a variable focal length.
resolution (digital image) The long focal length.
number of pixels per inch (ppi) or, tone The brightness of a pixel
in the case of a print, the number or area of a photo.
of dots per inch (dpi).
tonal range The full range of
resolution (lens) The amount of brightness levels found across the
detail a lens can record. photo, from pure black to pure white.
RGB (Red, Green, Blue) The three TTL (through-the-lens) A term
primary colors of digital cameras and used to describe automated flash-
monitors. metering systems in which the flash
saturation The intensity of a color. exposure is set by the camera rather
than by the flash.
shutter A light-proof curtain in front
of a sensor that is opened and closed underexposure The result of letting
during an exposure. too little light reach the sensor during
an exposure, producing an image that
shutter speed The length of time is too dark and that lacks detail in
selected for the shutter to be open. areas of shadow.
Shutter Priority A semiautomatic USB (Universal Serial Bus)
exposure mode in which the shutter A standard data connection used
speed is set by the photographer. to link digital devices.
SLR (Single-Lens Reflex) A camera ultraviolet (UV) filter A filter that
system that uses a reflex mirror to reduces the effects of ultraviolet light.
direct the image projected by the It has no effect on exposure and is
lens to an optical viewfinder. commonly used to protect the front
of a lens.
spirit level A device inside a camera
that can be used to ensure whether viewfinder An optical or electronic
an image will be horizontal or vertical. device that shows a photographer the
Spirit levels can be added to a camera scene that will be captured by the
via a hot shoe, or to a tripod. camera during exposure.
spot metering An exposure- vignetting A darkening of the
metering mode in which only a corners of an image that is either
small area of the scene is measured. accidental, such as when using a lens
at maximum aperture, or is applied
standard lens A 50mm lens deliberately in postproduction.
(full-frame) or 35mm lens (APS-C).
Also known as a normal lens, it weather sealing Built-in protection
produces naturalistic imagery that that shields the camera from rain,
closely matches human vision. dust, or humidity.
White Balance (WB) A camera
stop A unit in which aperture
sizes, shutter speeds, and ISO function that neutralizes the color
bias of a light source in a scene.
settings are measured.

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