Mamiya 7 User Manual page 19

LED Indicators in the Viewfinder
AE photography
Long time exposure
1 sec to 4 sec at the
A and AEL modes.
2 sec and 4 sec at
the Manual mode.
Battery drain increases in the AE mode
Battery capacity is
sufficient.
AEL photography
Under-exposure
Battery capacity
drops.
Manual mode
Over-exposure
When the Battery is
badly weakening.
Red warning lamp
17