Austin, Joe (NCI/IMS) wrote:

I just noticed that the ST-E2 transmitter only allows two groups for
wireless communication.  Why would Canon make a dedicated wireless
controller with only two groups when it programmed three groups into the
550ex flash?

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Sometimes companies have divisions that do not talk wo each other.
Perhaps this is the case, once team developed the ST-E2 and the 
other the 550EX.  When they found one had 3 and the other 2 groups
then they would call the spare "reserved for future use."
An eloquent way large companies  would otherwise have to say 
something like "we screwed up on this one."

Peter K
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