On Tue, 23 Jan 2001, Ken Lin wrote:
> > Could someone give me a one paragraph tutorial on the difference between
> > e-ttl and a-ttl?
>
> Disclaimer: Hope I'm right......
Pretty well... I'll just correct some things that I think are wrong 8-)
> A-TTL uses a pre-flash from a separate near infra-red strobe on the front of
> the flash unit to test out the subject illumination, this in my opinion
In 540EZ it's near infra-red, but wasn't it white on previous flashes? I
also don't think it test out the subject illumination in any ways.
> "can" sometimes be flawed in a situation where the flash head is tilted for
> bounce lighting, (I think) the pre-flash goes off after the shutter is half
I seem to remember that when bouncing the flash, 540EZ here with EOS 50e,
the flash defaulted to plain TTL. The older ones with white preflash did
do A-TTL in bounce mode also - IF I remember correctly... I've never used
them...
Bye,
Hugo.
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** Hugo Gävert **
** [EMAIL PROTECTED] http://www.hut.fi/~hugo **
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