Nikon D5100 Experience Manual page 14

Nikon D5100 Experience
contrast situations with a wide range of lighting. Some differences, however, are that you need
to hold your camera still for both shots so that the two frames line up and are not cropped when
combined, and that it is not recommended for moving subjects. Use Active D-Lighting for
action situations. See the High Dynamic Range (HDR) section below for further information.
Long Exposure Noise Reduction
This is used, obviously, to automatically correct noise in long exposures (over 8 seconds). Leave
this Off until you are intentionally taking long exposure images, then determine if you wish the
camera to do this correction or if you wish to do it yourself with Photoshop or other software.
Note that the noise reduction processing occurs immediately after you take your image, and will
take perhaps as long as the initial long-exposure took, during which time you cannot take another
image and should not turn off your camera. For example, a 30 second exposure may require an
additional 30 seconds for noise reduction processing.
High ISO Noise Reduction
The camera will automatically process images to reduce noise at 1600 ISO and above even
without this setting, so turn this Off and evaluate any noise issues in your images before deciding
if you might want to set this to Low or Normal later. Again, this can also be done later in
processing and often with more control in Photoshop or other software.
Figure 7 – ISO Sensitivity Settings Menu
ISO Sensitivity Settings
This is used to change the ISO setting, which is more easily done using the i Button and
Information Display. However, this also sets the optional Auto ISO Sensitivity Control, which
functions in P, S, A, and M modes. If you enable this (On) then the camera will automatically
change your selected ISO, without your expressed permission, in certain situations in order to
obtain a proper exposure. For example, if you are working in Aperture-Priority Auto Mode
(A) and set the ISO at 1600, but based on your selected aperture and the lighting the camera does
not believe there is enough light for the exposure and a realistic shutter speed (that you set – see
below), it will automatically raise the ISO so that the shutter speed does not become impossibly
slow for hand-holding. This may be good if you are still getting used to the cameras controls and
settings and wish for the camera to help you out a bit in certain situations where you may not be
paying close enough attention to your settings. Or perhaps in situations such as at a concert
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