JakTrax wrote:I can no longer see the image (except for the thumbnail) but to me the darkness in the bottom left corner doesn't look like typical vignetting - it looks more like an edge of something out-of-focus or possibly even some kind of shadow? I'd expect vignetting to be apparent in all four corners (unless your subject wasn't central and you've cropped significantly?), particularly top left/right in that blue sky. But like I say, I cannot really discern from a thumbnail.
Karl
I agree - looks like what I get when I'm shooting through a fence and catch some of the mesh in frame. Either way it should be fixable with the lens correction tool in Photoshop as Vinicius and Kas noted.