Nice shot. But as to your suppositions on asymmetrical lighting I don't
think there's anything strange going on with the flash. Remember that,
in every flash pic there are two exposures. There is a flash exposure
controlled only by flash power, ISO and aperture. And there is an
ambient light exposure controlled by ambient light, ISO, aperture and
shutter speed. Shutter speed plays no part in the flash exposure unless
the speed exceeds the sync speed (1/180 on E-510). But shutter speed
does play a part in the ambient exposure and grows larger with slower
speeds. 1/13 second is plenty long enough for the ambient light to play
a significant part in the exposure. Any asymmetrical lighting effects
are probably a combination of the ambient plus rapid light falloff from
the flash over such a short distance.
Dr. Flash
Jim Nichols wrote:
> While sort of house-bound while enduring a round of strong medication
> to get rid of fluid in my ears, I searched for suitable subjects
> within easy reach. While I see this every day, I had not given a
> thought to how it might be captured. With a little help from
> Elements 6.0, I finally got a version that I liked. I have not
> researched the E-510 flash synch literature in depth, but I am not
> sure how the on-camera flash worked at a shutter speed of 1/13 sec.
> I suspect that it fired early, giving the asymmetrical lighting that
> showed up.
>
> http://gallery.leica-users.org/v/OldNick/Mouse+Glow.jpg.html
>
> Comments and critiques welcomed.
>
> Jim Nichols Tullahoma, TN USA
--
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