D300 built-in flash, Part 1: Blinding speed

Started Dec 25, 2008 | Discussions thread
David314 Veteran Member • Posts: 4,790
Re: Close, but not quite there

Marianne Oelund wrote:

Then display the images side-by-side on
your computer, and you will see the darkening at the top in the
full-power image.

ah yes, the curtain closing makes it darker yes, i see that now and yes you can see it in side by side pictures - note black on bottom is a black border of a screen

it is interesting to note that you can turn the tables on where the darkening occurs by using FP flash with a radio trigger or shooting full power on the flash through SU-4 mode

A full power discharge continues to decay exponentially

for many milliseconds and exhibits no cutoff edge.
If you want to see the true peak characteristic of the flash output,
you need to place your detector a bit farther away from the flash, as
it's clipped the signal.

no it wasn't clipped by the measurement - it was turned off by the flash unit - full power same setup just 1/60 instead of 1/250

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