[radiowave]

Changing the focal length doesn't inherently change the perspective, and (resolution and lens aberations aside) is exactly equivalent to cropping.

What changing the focal length does do is (e.g.) make you stand further back, and that changes the perspective, causing distance compression, etc.

[Daub]

True. A change in focal length is exactly equivalent to moving the vanishing points further away/closer to the picture plane. See the vid at the bottom of this page:

https://rmit.instructure.com/courses/87565/pages/perspective...

[oasisbob]

Ahh, you're right. Thanks.