Originally Posted by Mark Elberson
Thanks Mark! [:P]
This wasn't meant to be a great shot, as mentioned I was just taking this pic for my own curiosity looking at the distortion.
Whether this is barrel distortion or mostly perspective distortion I'm not entirely sure. I definately agree that this pic does show perspective distortion, but I also thought this was barrel distortion as well. Maybe I'm wrong. But I have noticed (albiet I haven't done a direct scientific comparison) that at the extreme wide angles of this lens (ie 15-17mm) there seems to be some distortion of straight lines near the edges of the frame. Perhaps this is also perspective distortion, but it does seem to improve as with slightly longer focal lengths. Unless I really need the wide angle I try not to go wider than 20mm and this seems to help with the issue.
Stephen
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