Mild barrel distortion isn't too bad if it's symmetrical; when it's asymmetrical, like this, it can get seriously disorienting. Several photos where I knew I had aimed dead-on had a perspective as if I'd shot from the side. Here, the S5 IS's lens squeezes the left side vertically, though the right side is straight. (Shot at 36mm-equivalent; guidelines overlaid in Photoshop.)
Photo Credit: Lori Grunin
From: cnet.com
I got this picture from the review at cnet.com
didnt believe it at first, but after observing other's photos more
I took borrowed this image from
http://www.flickr.com/photos/peksh78/
clubsnap user - xanth78
using photoshop, added some simple (but ugly) 90degree, perpendicular, straight lines.
in the center of the photo, where the blue line is, the building looks straight,
but as it goes towards the sides, the buildings seem to be leaning

i dunno whether is it normal due to the angle.
but it seems serious n bothers me
Looks like singapore has its own leaning towers (building) of pisa le