"The whole FAQ is an excellent read, available at:
http://www.swissarmyfork.com/digital_photography_ifaq.htm
Good light, Frantisek Vlcek"
Thanks, Frantisek. If you follow the links to this guy's digital lens FAQ, he explains why ordinary TTL flashes do not expose properly with digital SLRs. The sensor has different reflectivity from film. That is the reason for the pre-flash. The metering is done off the shutter.
Joe
