Originally posted by RBellavance Perspective depends only on the distance to the subject.
The angle of view of a 55mm on a 1.5 crop camera is the same as that of an 85mm on a "full frame" camera.
Therefore, you will be at the same distance with either kit.
Ergo, the perspective will be the same.
Or is there something I misunderstood ?
You are pretty close.
As someone has stated, perspective is a function of image to lens distance. What people forget is that when they look in a view finder, to get the same image size (in the view finder) with a shorter lens, then they move in closer. it is that movement that alters perspective. If, on the otherhand, you shoot both a 55 (with ASP-C sensor) and 85 (on film) from the same distance and print the images on the same size paper, they will be identical in terms of size and perspective.
You can also take a telephoto and a wide angle, shoot something from the same distance and then enlarge and crop the wide angle shot to show the same field of view and again the perspective will tbe the same (it is just that that moch crop and enlargement produces a really bad image,