I'm getting strange diagonal flare on
this panorama (can't get the shot to show up here directly).
It's a stitched shot with Sigma 10-20mm, circular polarizer and Canon 30D. The flare is visible in the individual shots, but not as much as in this post-processed shot.
Does this look like flare from shooting head-on with a sub-par lens? Polarizer? Or is the harsh lighting too much for most lenses? Fortunately this is something that's fixable in post, but I'd like to avoid this in the future.