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85
THE EXPANDED GUIDE
FUNCTIONS
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WHITE BALANCE / ISO SENSITIVITY SETTINGS
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Auto-ISO
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ISO SENSITIVITY SETTINGS
The ISO setting governs the camera’s
sensitivity to greater or lesser amounts
of light. At higher ISO settings, less light is
needed to capture an acceptable image.
As well as accommodating lower light
levels, higher ISOs are also useful when
you need a small aperture for increased
depth of field (see page 60) or a fast
shutter speed to freeze rapid movement
(see page 56).
Conversely, lower ISOs are useful in
brighter conditions, and/or when you want
to use wide apertures or slow shutter
speeds. The D5300 offers ISO settings from
100 to 12,800. Image noise (see page 113)
does increase at higher settings. The D5300
manages this well, but you may still find
noise levels at the highest ISOs exceed
your tolerance—try a few shots and see
for yourself.
There are additional Hi settings beyond
the standard range. These are Hi0.3
(equivalent to 16,000 ISO), Hi0.7 (20,000
ISO), and Hi1.0 (25,600 ISO). Here, noise is
unquestionably obvious and you’ll probably
want to use these settings only as a last
resort. You can go even higher using Night
Vision in the Effects modes (page 50).
By default, the D5300 sets the ISO
automatically. It’s possible to change to a
manual setting in most exposure modes
(except
, , and ). This new setting
will continue to apply if you switch
exposure modes. However, if you switch
to P, S, A, or M mode and then back to a
Scene or Effects mode, the camera reverts
to Auto-ISO. The D5300 only permanently
“remembers” manual settings in P, S, A, or
M modes.
The ISO sensitivity settings item in the
Shooting menu has a sub-menu called
Auto ISO sensitivity control. This is only
available in P, S, A, and M modes. If you set
this to On, you can still manually select an
ISO setting, but the D5300 will
automatically override this if it determines
that this is required for correct exposure.
Extra options within this menu allow you
to limit the maximum ISO and minimum
shutter speed which the camera can
employ when applying Auto ISO sensitivity
control. For instance, if ISO 3200 produces
too much image noise for your liking, you
can set the Auto-ISO limit to 1600.
Nikon D5300 Ch2 022-105 P2 RY.indd 85Nikon D5300 Ch2 022-105 P2 RY.indd 85 19/02/2014 15:4319/02/2014 15:43
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