[bryan conner]

Thanks Arv. My lens has never been that good in my opinion. Of course, looking at a print of an image or even the image on a screen and deeming the corners to be excellent is subjective. The confusing part is that the lens gets such bad reviews from users on a wide variety of web pages and forums....but it also gets good reviews on some sites also. I do not want to expect too much out of the lens if the quality will never be there. I purchased it used several years ago and I got a good deal on it.



I would really like to have a method of making a fair determination of the focus performance of the lens. Should I photograph a newspaper (or something similar) attached to a wall to judge the performance? Or, is there a better method? I want the test to be as fair and as accurate as possible before I go through the process of sending it in to Sigma.