With the SB-16B
As soon as the flash unit is turned on, the ready- light on the flash unit lights up when the flash is ready to fire , while the ready-light in the camera 'sviewfinder blinks in the following cases :
1)When the shooting mode selector is set at TIL with any camera other than the Nikon FA, FE2, F-501/N2020,F-301/N2000 ,FG, or Nikons-V.
2)When using the FA, FE2, FG or Nikonos-V to perform TIL automatic flash photography with the camera's shutter speed dial set at a mechanical setting (M250, M90 or 8). The B setting on the F-501/N2020and F-301lN2000 camera is not a mechanical setting; you can use any set- ting on the camera'sshooting mode selector.
3)When using the FA, FE2, F-501/N2020, F-301/N2000, FG or Nikonos-V to perform TIL automatic flash photography with a camera film speed setting over the usable range, without exposure compensation (or when using DX-coded film with film speed higher than ISO 1000 for the F-501/N2020 and F-301/N2000). Make sure to use film within the usable range for TIL flash photography (ISO 25 to 400 with the FA, FE2, FG or Nikonos-V, or ISO 25 to 1000 with the F-501/N2020 and F-301/N2000) .
With the FA, the ready-light also blinks when the film
speed setting on the camera is near ISO 12, with or without exposure compensation in the + direction.
4)When the shutter speed setting on the FM2 or FE is im- proper for flash synchronization and the camera's meter is on (only in the case of the FE).