Vesa Perala wrote:
>
> >one can get the same results with M mode: set time to 1/125
> >and select aperature.
>
> It seems many are missing a feature which would limit the
> *longest* shutter speed to something handholdable
> (e.g. 1/focal lenght) when flash is used in Av mode.
>
What's the problem with M mode? You even have a selectable fixed
shutter speed. I don't know much about E-TTL, but wih A-TTL in
AV Mode and with a fixed shutter speed, there is nothing left
to do for A-TTL, it should default to plain TTL then. And that's
what you get in M anyway.
> This would help e.g. when you need to move in a hurry from indoors
> to outdoors (e.g. when a just married couple exits the church):
> - Indoors the flash would give most of the needed light while the
> ambient light would be underexposed or not depending on the case.
> But the exposure time would never exceed the limit, e.g.
> 1/focal length.
> - Then outdoors the sun would give enough light for the Av mode to
> give proper exposure and the flash would be only a fill-in light
> source.
> - The change from flash as the main light source to fill-in should
> be where the ambient light starts to give enough light for proper
> exposure.
>
Ah, I see. In this case some people might prefer to have AV outside,
to get an automatically adjusted shutter speed. Ok, M doesn't give
you that, but is nevertheless very much preferable over AV IMHO.
AV will vary your exposure depending on your subject. OTOH, if
you thoroughly metered the lighting ONCE and the lighting isn't
changing all the time, life is much easier with M mode. Meter once,
set your aperture and shutter speed and click away without worrying
about exposure anymore. Taking a meter reading and setting the values
can be done pretty fast and you have to plan ahead anyway in such a
situation. There's no point in gambling when doing wedding pics,
at least if you are responsible for the official pics.
> This functionality should be CF-selectable and it should work
> only when the flash is ready.
>
Isn't there even such a setting on some higher level EOS bodies?
I think on the 5 and 1N I can fix the shutter speed to the
flash sync speed by setting a CF.
> I can see one option even now - to use Tv mode (e.g. 1/90 sec)
> without the SafetyShift functionality but then indoors the
> aperture would always be the largest one (no good e.g. with f2.8
> lenses).
>
Again, I would use M mode.
Thomas Bantel
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