b2 EV Steps for Exposure Control
Explanation: This menu defines in which steps the changes of aperture and exposure time are done: 1/2 EV or 1/3 EV (default).
As in the previous menu for ISO sensitivity changes the basis are the series of common exposure times (…, 1/60 s, 1/125 s, 1/250 s, …) and aperture (2.8, 4, 5.6, …). They get one respectively two values in-between when choosing 1/2 or 1/3 in this menu.
Different from the auto ISO sensitivity control the exposure control of the D7000 will use steps only as defined in this menu.
Tips: Leave the default of 1/3 EV.