> "Gary Fisher" <[EMAIL PROTECTED]> wrote: ...
> If the Speedlite has no FEC set and the 7E has, how
> did you pick up the lack of compensation? Was it from
> comparing photo results or were you using a
> flashmeter? ...
Hi Gary,
Here's the bottom line: It didn't, but it does now.
I tested this visually, but also confirmed with built-in
flash meter in the Elan 7E.
Confused? Here's the story...
I got some strange results with my first flash pictures on
print film using flash, so I visually checked that flash
output varies over a four stop range FEC +2 to FEC -2
(16:1 ratio).
Using only the Elan 7E popup flash, it was very easy to tell
that FEC was behaving correctly. It also corresponded to the
result of ISO indexing.
After your e-mail, I checked the Elan 7E and 550EX again,
but now it seemed that body FEC DOES affect Speedlite output.
Intrgiued, I investigated why I arrived at the opposite
conclusion two months ago...
It seems that I had left the 550EX in TTL mode (CF3=1).
The difference in flash output was easy to see, like it
was with the popup flash, which is also TTL.
So, I put the 550EX back to E-TTL mode (CF3=0), and now
I could not visually tell the difference between FEC +2 and
FEC -2.
It seems that the E-TTL 1/32 preflash was obscuring my
ability to detect changes in the true flash output!
When I separted the preflash from true flash output (by
using 2nd curtain sync), I could ignore the preflash
(by closing my eyes). The flash output DOES vary with
body FEC.
This result is also confirmed using the flash meter built
into the Elan 7E.
Cheers
Julian Loke
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