Notes On Flash Photography - Nikon N90 AF Instruction Manual

NOTES ON FLASH PHOTOGRAPHY
• Use only Nikon 8peedlights. Other units may damage the
camera's electrical circuits due to incompatible voltage
requirements', electric contact alignment or switch phase.
• Not compatible with 250 V or higher.
• When using a special 8peedlight such as a studio strobe
system, with a time-lag provision or one with a long flash
duration (i.e., Medical-Nikkor 120mm f/4), adjust shutter
speed down to 1/125 sec. or slower.
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• For multiple flash photography using the N90, if the electric
current in the syncro circuit exceeds a certain level, you may
not be able to take a second shot after taking the first shot.
Take care that the combined total of the coefficient (numbers
shown in parentheses below) for all 8peedlights used at any
one time does not exceed 20 at 20·C/68·F or 13 at
40'C/104·F.
88-25 (1) 88-24 (1)
88-21 (4) 88-20 (9)
88-17 (4) 88-16 (4)
88-12(1) 88-11(1)
88-23 (4)
88-19 (2)
88-15 (4)
88-22 (6)
88-18 (16)
88-14 (1)
If you are unable to take a second shot, disconnect the
master 8peedlight from the camera, or tum each of the
8peedlights off and on at once. This resets the circuits so you
can resume shooting.
This also applies when using any non-Nikon studio speed light
system.