Crikey, this thing will weigh 5 pounds.
But it might be 5 pounds of awesome.
I'm not trolling here, this is a serious question... but is weight even really that big of a deal? As long as the size is not so huge that I can still fit it in my camera bag and ThinkTank Airport Security case, weight has never really been something that bothered me.
I find that after 12 hours of shooting a wedding, my neck, back, and shoulders are going to hurt no matter what I am carrying. Nevermind the fact that the 70-200 F2.8 II is probably quite a bit heavier than this will be anyways. Just curious to see how important weight is to most people when making a purchase, as it really doesn't affect my personal gear choice for a long day of shooting.
I'm a big guy, and when I'm in shape, which may or may not be the case, I can usually work out with 40 lbs dumbells for bicep curls, and up to 60 lbs for chest...
So the weight doesn't really affect me all that much, but if you have an extra lbs or two hanging from your neck over 8+ hours, it can start to give you a cramp... and your wrists and forearms can start to ache... mine too... but I just ignore the pain.
For an hour... most people can deal... but over the course of a day... then that starts to wear on you.
As an example... when I played football, I would be in incredible shape before camp started... but wearing the helmet for two a day practices cause a pretty severe ache in my neck and shoulders.