Gotta Fix Them Leaners
You’ll notice that my shots of the twin towers were plagued by the phenomenon called distorted perspective (or something like that). That’s when the top of the buildings lean much like a certain tower in Pisa. This problem will crop up when shooting tall structures. Squat short structures will not suffer that much from the effect. Dave Johnson of PCWorld describes it clearly here.
If like me you don’t have the costly Tilt-Shift lens, then your salvation lies in getting the software to correct the issue for you. When you’ve interest in historical buildings and architecture, you’ll need any help you can get. Bless digital photography!
After some trial and error, I corrected the shots I made last night and the result's what you see above. Some useful guides and tutorials here: http://www.photoshopbox.com/photo-retouch/fix-perspective.html http://photography-on-the.net/forum/showthread.php?t=579968 http://livedocs.adobe.com/en_US/Photoshop/10.0/help.html?content=WSF65FB40F-00F5-445a-BD9A-38B3737A9A19.html