[JJ_SO]

I'll try the same. Actually I was looking in some files I made weeks ago, but it only showed how sensitive wide-angles can be when it comes to side-light. And I cannot make a fair comparison anymore because I don't have FF and APS-C with equal pixel count - down- or upscaling already changes too much.

 

I fully agree with your point of perspective (same distance will always give the same perspective) I just suspect the results as silghtly different because not everything is eyxactly the same scale. But I also don't have a real proof to what I think might happen.