On Tue, 1 Dec 1998 12:27:03 +0100, "Hans van Veluwen"
<VELUWEH@xxxxxxxxxx> wrote:
>
>
>John P wrote:
>
>>Picked up the slides from the lab this afternoon from the macro flash
>>comparison test. Point your browser of choice to
>>http://www.webgenuity.com/om.htm to see a more detailed explanation of
>>how it was done and the results.
>
>
>Interesting comparison. It would also have been nice to see the results of
>the T28 twin with just one head activated, and with both heads, having a ND
>4 or ND 8 filter installed on one of them. The one stop reduction the
>diffuser provides apparently isn't enough to create plastic shadow effects
>(if that's what you would want); the double shadow of the staminals looks a
>bit unnatural.
>
>Hans
I missed some of the earlier discussion, but maybe I can add some
knowledge here:
The GN of a single T28 (or one head working only of the twin set) is
much higher than that of the T28 twins with both flashes working at
the same time.
I think 28 is the GN (meters, 100 ASA) for one T-28 head. If you use
the double set the GN is reduced to 20 or 22.
Frank van Lindert
Utrecht NL.
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