There are two things going on here. First of all, the plugs themselves are different. But so is the voltage.
It's possible that your ipod or camera battery charger already have dual/multi voltage. US runs on 110 v and over there it's 220-240 v, I think. It should say on the device what the voltage range is. Plug adapters are cheap and easy. You can pick them up for less than 5 bucks just about anywhere that sells travel stuff.