Hi John,
> But when > would you need to have AE Lock separate from AF Lock? (Please give an > ex&le.)
If the subject you want in precise focus (or in the center of your depth of field focus) has a different exposure than you want.
> Wouldnt your subject be the point of focus all the time and > wouldnt you want your subject to be properly exposed? (eg. a human > face in the shade on a bright day).
Picture a child in a museum...they are standing behind a science exhibit that you want in focus, and you want them out of focus, but...you want the exposure to be correct for them.
I focus on one thing, and expose for another quite a lot of the time...
Regards,
Austin
> But when > would you need to have AE Lock separate from AF Lock? (Please give an > ex&le.)
If the subject you want in precise focus (or in the center of your depth of field focus) has a different exposure than you want.
> Wouldnt your subject be the point of focus all the time and > wouldnt you want your subject to be properly exposed? (eg. a human > face in the shade on a bright day).
Picture a child in a museum...they are standing behind a science exhibit that you want in focus, and you want them out of focus, but...you want the exposure to be correct for them.
I focus on one thing, and expose for another quite a lot of the time...
Regards,
Austin