I took this shot this evening on my 300d and 18-55 efs lens. I was quite happy with it apart from the slightly washed out sky but the worst thing is the bending horizon. Ive read a little about barrel and pinch distortion but still dont understand it fully. Why does it happen? Is it the camera or lens? Can i stop it happening again? Can i fix it using PS7?
Any help would be gratefully appreciated.