Exactly. If I take a picture of you standing naked in front of your first floor window, it's totally acceptable, you should have expected to be noticed. However

Exactly. If I take a picture of you standing naked in front of your first floor window, it's totally acceptable, you should have expected to be noticed. However if I use a teleobjective to photograph you getting naked out of the shower on the twelfth floor, that's an invasion of your privacy - because your expectations were different.