Snatesan,


Post this and additional pictures at flickr where you can upload a decent file size plus we can click on the image and take it to the preview page with the black background and maybe see what you are seeing. The basic account is free where I find it a good place to host images.


On a side note one time I got a Sigma wide angle lens and the whole left side in a large circle was soft while the right was sharp. Bought it locally so I just returned it. I don't think I could ever get myself to buy another Sigma with the overall results that I have experienced from three different lenses.