Nikon D90 user manual Manual, Repeating Flash, 187, Output, Times

❚❚Manual

Choose a flash level between Full and 1/128 (1/128 of full power). At full power, the built-in flash has a Guide Number of 18/59 (m/ft., ISO 200, 20°C/68°F).

❚❚Repeating Flash

The flash fires repeatedly while the shutter is open, producing a strobe-light effect. Press 4 or 2 to highlight the following options, 1 or 3 to change.

Option	Description
Output	Choose flash output (expressed as a fraction of full power).
	Choose the number of times the flash fires at the selected output. Note that
Times	depending on shutter speed and the option selected for Frequency, the actual
	number of flashes may be less than selected.
Frequency	Choose how often the flash fires per second.
A “Times”
The options available for Times are determined by flash
		Output	Options available for Times
output.		1/4	2
		1/8	2–5
		1/16	2–10
		1/32	2–10, 15
		1/64	2–10, 15, 20, 25
		1/128	2–10, 15, 20, 25, 30, 35

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