550ex question

[Yavor75]

OK.. I should know this. Using my 550ex and 10D, I use the my lumiquest flash bouncer and adjust flash compensation on the flash by about +one stop. I've use it only once so far.
Should the 550ex still be able to do it's E-TTL thing and give me correct exposures as I move into different shooting situations/distances? On my Olympus E10 and F-40 I would have to adjust the compensation for the distance I was from the subject...like it was manual.

Any experience here?
Bob

[Morden]

ETTL ought to compensate automatically, as it is based on the flash light actually reaching the lens.

[lziering]

E-TTL will usually work as long as the camera is in program mode and you don't focus and then recompose. It gets trickier when you move to Av or Tv.

This is all explained pretty well here: http://photonotes.org/articles/eos-flash/

[tonygamble]

See my reply on the Flash Exposure thread.

That Photonotes site does not appear to cover this very important point.

Tony