Quote:
Originally Posted by Billup
Might be a noob question, but, what kind of obstacles am I going to encounter that I haven't with a standard lens with a wide-angle? A wide angle lens has almost been on my wish list, and I really would like to get back into it now that I have an abundance amount of spare time.
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Barrel distortion is the classic problem as you go wide. Two images below demonstrate the problem. The first is taken with my Sigma 15mm f/2.8, uncorrected. The second is the same image, but corrected for distortion in post processing:
Fisheye Shot by
dcstep, on Flickr
De-fished Image by
dcstep, on Flickr
That's a "fisheye" lens, with a 180-degree field of view, so it's as extreme as barrel distortion gets, but you get the idea.
You minimize the distortion by keeping the camera's sensor parallel with the subject, but even when parallel a fisheye has lots of barrel distortion.
Dave