From: =?ISO-8859-1?Q?Hugo_G=E4vert?= <[EMAIL PROTECTED]>
Subject: Re: EOS Studio with only Canon EX flashes?!?
> > > The wireless flash commands from 550EX use 1/32 power of
> > > the flash if I remember correctly (could also be 1/64).
> >
> > That is *very* little output. Not enough if you want
> > accented lighting setup in more than a close-up stillife
> > situation.
>
> That is for trasferring the commands, not for
> lighting the subject.
I know, I can read. Still it is very little energy.
The receiving system must receive enough light to detect
command signals, and it must be enough to differentiate
the comands. 1/32 power is not very much for this task,
since you cannot amplify incoming signals to infinity.
It is enough if you can *see* the remote device.
And that was my main point: This limits the photographer
very much in his ability to set lights in scene.
> But I, unlike you, have seen the wireless E-TTL in
> action (but I've not seen the results, that's why
> I'm asking this) and the commands do transfer very
> easily.
As long as one can see the remote flash, right. I have
worked with servo cells of all kinds, including the very
high sensitive Wein cells. There were numerous situations
where the cell wouldn't fire the flash, and the primary
flash was a heavy studio flash device.
Believe me, wireless is less energy, and it needs control
commands, not just a firing impulse.
On the other hand I understand that you possibly have no
idea about the lighting I am speaking about.
> And that is not just theory, as what you are saying.
Given the physical basics and my professional experience
in lighting, I am talking fact.
> > Show me their results and I tell you why they got away
> > with wireless......
Somebody just posted an URL to the Flash Works brochure
online. I have looked at it, and find all my statements
proven there. This evening I will post a detailed comment
on all seven samples and tell you, why wireless TTL is well
overpriced and why the system worked in these specific
situations with respect to my aforementioned reservations.
Maybe you see better what I mean afterwards.
--
Michael Quack <[EMAIL PROTECTED]>
http://www.photoquack.de
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