D5100 Settings for Exposure
The settings that determine the brightness of your pictures – how exposure is measured and how it is translated into aperture, exposure time, ISO sensitivity – are the following:
Shutter release button
top
pressing it halfway activates the exposure metering
c1 shutter-release button AE-L
custom setting menu
defines if pressing the shutter-release button halfway will also lock the exposure metering
Camera mode dial
top
defines the camera’s operation mode that is linked to a type of exposure control
Exposure metering
shooting information
defines the type of exposure metering (matrix, centre-weighted, spot)
Exposure compensation button
top
allows to set a positive or negative exposure compensation together with the command dial for brighter or darker pictures
AE-L/AF-L button
back
locks the currently measured exposure (unless custom setting menu f2 defines another action for this button)
Command dial
back
- in camera mode P: program to shift to change combination of aperture and exposure time
- in camera modes S, A, M: set aperture and / or exposure time
ISO sensitivity
shooting information
defines the ISO sensitivity, i.e. how sensitive the camera sensor reacts to light
ISO sensitivity settings
shooting menu
defines the ISO sensitivity and allows setup of automatic ISO sensitivity control
d2 ISO display
custom setting menu
allows display of ISO sensitivity in the viewfinder
Fn (function) button
front
allows to set ISO sensitivity together with the command dial if custom menu f1 is set to „ISO sensitivity“
b1 EV steps for exposure control
custom setting menu
defines the size of steps by which the and exposure time, aperture and exposure compensation can be changed