RE: EOS flash with 10d

[bud kuenzli]

also, keep in mind that the camera and flash think that white dress 
is a grey dress. It will attempt to expose the white dress (assuming 
it is the predominate area you are metering) as if it were a medium 
grey dress. If you are getting a dark dark dress there is something 
wrong, but if your exposure results in a grey dress and your exposure 
is about a stop to a stop and a half dark, then you are about in the 
right ballpark. That is what the fel button is for, so you can do a 
flash exposure lock on a medium grey area, then recompose and shoot. 
Or, knowing that the white dress is about a stop and a half off, dial 
in compensation. Another thing to do is to focus, set the camera to 
manual focus and then shoot. In manual focus, the camera won't use 
the focal point for a flash exposure lock and it will average the 
reading more. That won't stop it from looking at the over all scene 
as grey, but it will help if you have a focus point on a white object 
with a black object next to it.
    this is what the ETTL II is all about...it does a better job of 
averaging the exposure and doesn't rely on the specific focus point 
for flash exposure like ETTL does.
--
Bud Kuenzli

 In cyberspace when you get where you're going you still don't know 
where you are.
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