the sb-900 is a tremendous flash. The only real difference bewtween it and the 580ex II is the inclusion of su-4 mode which allows it to be triggered remotely by another flash. (The SB-800 and other flashes have this also)
There are some other differences
Actually just sold mine to get another 5D Mark II
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Hesitate. Pull me in.
Breath on breath. Skin on skin.
Loving deep. Falling fast.
All right here. Let this last.
Here with our lips locked tight.
Baby the time is right for us...
to forget about us.
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