D5100 Settings for Exposure

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