Good morning everybody First time posting (hopefully I have posted this in the right place!). I recently bought a second-hand Sigma 17-50mm F3.8 EX DS OS HSM for my Nikon D3300 to upgrade from the kit lens (PS> I am an amateur!). I used it for the first time yesterday and I must admit that I was a little disappointed with the images once I got home and put them on the PC (they looked pretty good on the screen but I know that can be deceptive!). I was shooting using the viewfinder, not live view btw. Also, shooting in aperture priority, still a bit nervous of going full manual! I recently upgraded my Nikon onto the V1.1 firmware. I did some searching around the forums and I couldn't find a definitive answer that would help me so I wanted to upload some pictures from yesterday as well as some test ones that I have just taken - http://www.amateurphotographer.co.u...50mm-f2-8-ex-ds-os-hsm-images-not-sharp.1995/ Is it me rather than the lens (quite possible)? Or am I expecting too much? In someone's more professional opinion, are these normal and what I should be expecting? Is it a problem with the lens maybe? Any further tests I can do to find out? Any help/advice would be greatly appreciated. Thank you in advance.