Homeland Tourist

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Every time I walk through the old city of Nuremberg with my camera I look like a tourist between all the other folks with big cameras from Japan, Italy or the US.
Local people always look a little puzzled when I start talking with the local Franconian accent because I'm supposed to be a stranger.
It's really hard to explain that it's not the camera that makes a tourist.
Why the hack is it so unusual to take photos in your own city?