I have been using this lens for quite some time now. I do not know if I am doing something wrong, distance from subject causes this, or maybe just dirty.....when I take a photograph as close as I can get and sometimes just a step back I can get some amazing sharp quality photos even when you blow them all the way up to the max resolution (6.1mp for my camera - so 2000 something x 3000 something i think)they look great, buttt when I take a photograph from a few feet or more away from the subject, then the quality is really crappy when I view the photo at anything larger than say 800x600. Is this normal? Here are some examples: This is a photo taken at just a foot or two away, fully blown up and a piece taken out of the photo - i think the quality is wonderful: These two were taken at about 5-6 feet away and the quality is less than desirable. The first one was shot at about f/6 and 1/250: This second one was shot at f/2 1/100 If anyone has any suggestions or advice, please feel free to give it to me!