MY lens arrived today from Adorama (Used but in "D" condition which is basically demo model condition) The lens is great, except that it does not focus closer than 2.5m??? I have tried changing the button from infinity-2.8 to FULL but still does not focus closer than 2.5m. Anything further than 2.5m focuses fine. Is there something wrong with the lens or is it me doing something wrong??? Using the lens on a D50. I am from South Africa so sending it back to Adorama is going to be a mission and a half.