Oh, okay, I see what you're saying - I've got a bad lens here, that's all there is to it. I should go to B&H and demand my money back, or send it off to Canon for recalibration. Like you said, if I'd bought the 10-22 I wouldn't have to deal with this problem.


(!)


No. But seriously wick - thanks for the explanation. I thought I "knew" about the effect you describe, but I haven't seen it so pronounced until yesterday. Everything I've shot with the 17-40 up till now has been true landscapes, focused at infinity and without any buildings nearby. I'm guessing that's why I haven't noticed much of this "distortion" before.


So perspective distortion will appear stronger the more you raise the lens (shoot upward). To minimize the effect (besides using a tilt/shift) you can keep the camera level. Is there anything else?


Thanks again wicker - and thanks everybody for the comments, I really appreciate it.