On Wed, 24 Jan 2001, Hugo Gävert wrote:
> On Tue, 23 Jan 2001, Ken Lin wrote:
>
> > 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.
It's the same in my 420EZ and 430EZ, a white preflash from the main flash
tube is used only when the flash is in bounce mode.
>
> > "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...
True.
Thomas Bantel
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