Eyron wrote:

> The camera is in manual mode and is a Fuji S2 Pro.
> If I have a set shutter speed (ie sync at 1/125 sec) and the correct
> aperature reads say  F9 .
> I need the shutter speed to be 1/125 sec.
> But I need a lower F stop to limit depth of field.
> Will minus 3 stops of exposure control alow this and give me a 3 stop larger
> aperature?

Wrong way to do this, since your exposure will be way off.

>
> Also what would my F stop be here?
> Are there any drawback to use exposure compensation. ( ie noise etc.).

Improper exposure. You would be better off setting the ISO speed three stops
different to force a larger aperture (smaller number). Your other option, if
you cannot alter the ISO setting that far, would be to place a three stop ND
filter over the front of the lens. The ND filter can get you exactly where you
want to be, without changing the ISO setting. Those with film cameras reading
this post can also do the same thing, and is one of the best reasons to own an
ND filter.

Ciao!

Gordon Moat
Alliance Graphique Studio
<http://www.allgstudio.com>