Hi I was just reading up on why I can't use my 430EZ with my 20D, and found something confusing about E-TTL instead.
from the page http://photonotes.org/articles/eos-flash/index2.html#recompose on EOS cameras and flash it says: If you’re in the habit of using the old “focus, lock AE and recompose image” technique, be sure not do this when taking flash photos I'm a little confused by this, as when using flash in manual mode, its primarily the distance that is used for GN calculations. Assuming youre focusing on the main subject, then this distance information has always given me the basis for what I wanted in exposure. Measuring reflectance is problematic anyway, which is of course the reason for the existence of incident flash meters. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
