Do you have any other samples you can post. Neither of those are too sharp, and I know that lens can be very sharp. Have you had any focusing problems with it? What camera was used for the two samples above? Thanks!
anything that shows the quality of the lens. FYI, just my opinion - in most cases when you're using a flash, you should not have the lens open to 2.8, especially if there is action involved - that is, unless you have a pro lens/body that can auto focus that quick/accurate.
