Nikon D500 - Manual (Page 160)

134
A : Aperture-Priority Auto
In aperture-priority auto, you choose the aperture while the
camera automatically selects the shutter speed that will produce
the optimal exposure.
To choose an aperture between the
minimum and maximum values for the
lens, rotate the sub-command dial while
the exposure meters are on. Aperture
can be locked at the selected setting
(
0 140).
A
Non-CPU Lenses ( 0 323, 325)
Use the lens aperture ring to adjust
aperture. If the maximum aperture of the
lens has been specified using the Non-
CPU lens data item in setup menu
(
0 251) when a non-CPU lens is attached,
the current f-number will be displayed in
the viewfinder and control panel,
rounded to the nearest full stop.
Otherwise the aperture displays will show only the number of stops
(
F, with maximum aperture displayed as FA) and the f-number must
be read from the lens aperture ring.
Sub-command dial