I am a quite shy person ad often, when i find an interesting composition-subject (like a person doing something, a goup of people in a nice setting etc), i struggle to capture it because i feel like i’m being rude taking pictures without their approval, but at the same time i think that, by asking them, the spontaneity of the shot would be compromised. What’s your take about it?
That’s very correct question.
90mm or 135mm will help. After you will decide for yourself that at least you don’t interrupt and bother them.
All in all, then you shoot a city central square, you can’t ask every stranger for their permission.