Originally posted by Mccsiz What, for example, would have happened to these images using the wide angle lens?
If you want to play with distorsion, we'd need to ask if what you want is a rectinear wide angle or a fish.
I would think that to play more you'd want a zoom lens, not a prime. By playing with the zoom you can control the level of distorsion depending of what you want to achieve. In reactilinear I think the most interresting for your case would be the Sigma 8-16. The Pentax 10-17 is also very interresting too and is allow a magnification of 1:2.5@17mm.
The DA10-17, this is the sort of picture it would make (taken again from a search in flickr). Because it is zoom (not common from a fish) you can control the level of distorsion. 10mm is a 180°, 17mm is a 120° fish.
The sigma 8-16 is a rectilinear wide angle. It will not curve the line like the fish. It no able to get the same magnification (1:7.8) but if you are not into too extreme close up, that should be it (the window example do not seems to look that small in reality no ?). An example from a search in flickr, again:
Please also notice that in post processing you ca apply perspective distorsion to any shoot. You can reduce the effect of a wide angle, transform a fish into a rectilinear (with some sharpness problem on the borders), a rectilinear into a fish (with obviouly more limitation in max angle of view) and in general tweak the perspectives of your photos.
I use this in particular to ensure my shoot are free of disgracious distorsion but you can also do the reverse, of course. It depend of what you want to express. DxOView is I think an example of such post processing software with good ergonomics.
Also, you might not be into that but thoses 2 wide angle do provide some very nice city landscape when on a trip.