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too-bright image, often with clipped
highlights.
Pixel (picture element) The individual
colored dots (usually square) which make
up a digital image. One million pixels =
1 megapixel.
Post-processing Adjustment to images
on computer after shooting. Can
cover anything from minor tweaks of
brightness or color to extensive editing.
ppi (pixels per inch) Should be applied to
digital files rather than the commonly
used dpi.
Reproduction ratio The ratio between the
real size of an object and the size of its
image on the sensor.
Resolution The number of pixels for a given
dimension, for example 300 pixels per
inch. Resolution is often confused with
image size. The native size of an image
from the D5300 is 6000 x 4000 pixels; this
could make a large but coarse print at
100 dpi or a smaller, finer one at 300 dpi.
RGB (red, green, blue) Digital devices,
including the D5300, record color in
terms of brightness levels of the three
primary colors.
Sensor The light-sensitive image-forming
chip at the heart of every digital camera.
Shutter The mechanism which controls
the amount of light reaching the sensor
by opening and closing to expose the
sensor when the shutter-release button
is pushed.
Speed rating/rated speed A measure
of the performance of memory cards.
Speed rating is most important when
shooting still images. See also Class
rating.
Speedlight Nikon’s range of dedicated
external flashguns.
Spot metering A metering system which
takes its reading from the light reflected
by a small portion of the scene.
Telephoto lens A lens with a large focal
length and a narrow angle of view.
TIFF (Tagged Image File Format)
A universal file format supported by
virtually all image-editing applications.
TTL (through the lens) The viewing
and metering of SLR cameras such as
the D5300.
Underexposure When insufficient light
reaches the sensor, resulting in a too-
dark image, often with clipped shadows.
USB (Universal Serial Bus) A data transfer
standard, used to connect to a computer.
Viewfinder An optical system used for
framing the image. On an SLR camera
such as the D5300 it shows the view as
seen through the lens.
White balance A function which
compensates for different color
temperatures so that images may be
recorded with correct color balance.
Wide-angle lens A lens with a short focal
length and a wide angle of view.
Zoom A lens with variable focal length,
giving a range of viewing angles. To
zoom in is to change focal length to
give a narrower view and zoom out is
the converse. Optical zoom refers to the
genuine zoom ability of a lens; digital
zoom is the cropping of part of an image
to produce an illusion of the same effect.
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Nikon D5300 Ch9 220-237 P2 RY.indd 236Nikon D5300 Ch9 220-237 P2 RY.indd 236 20/02/2014 14:2720/02/2014 14:27
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