A Guide to Perspective Distortion
Distortion In The Angles
Lastly when you change your perspective and you then use a lens to give you the framing you want you also change the angle. Now this is not about the perspective distortion but that different perspectives and angles can change what is in the frame.
By now you should be seeing the change in perspective distortion so you expect to see more or less buildings but where did the other trashcan go?