Thanks for the kind words, Chuck, and for the commentary. Most of my "fill
flash" shots outdoors show 1/80th. I was just surprised at the results.
With the lens stopped down, the shutter showed 1/80 and the flash highlight
was dead center. With the lens wide open and the ISO raised from 200 to
800, the shutter showed 1/13 and the flash highlight was on the right side.
I liked the latter one best.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Sunday, August 29, 2010 6:42 AM
Subject: Re: [OM] IMG: Mouse Glow
> 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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