Nikon D780 DSLR Camera (Body Only) - Manual (Page 507)

461 On-Camera Flash Photography
4
Adjust shutter speed and aperture.
5
Take pictures.
D Shutter Speed
Shutter speed can be set as follows when an optional flash unit is used:
* Shutter speed may be set as slow as 30 s if slow sync, slow rear-curtain
sync, or slow sync with red-eye reduction is selected for flash mode.
D Use Only Nikon Flash Accessories
Use only Nikon flash units. Negative voltages or voltages over 250 V
applied to the accessory shoe could not only prevent normal operation,
but damage the sync circuitry of the camera or flash.
Mode Shutter speed
b , P , A , EFCT ( j and
m excluded)
Set automatically by camera ( 1 /
200
s– 1 /
60
s) *
S Value selected by user ( 1 /
200
s–30 s)
M Value selected by user ( 1 /
200
s–30 s, Bulb , Time )