Fri 19-Oct-12 11:59 PM | edited Sat 20-Oct-12 12:01 AM by RSchussel
I dont think any of your shots are razor sharp because you are using the 18-200mm zoom. For what it is its a good lens but its not in the same league as prime telephotos or pro zooms like the 70-200.
Also as other have commented in your intial photos you are shooting a relatively small object against a blue background.White birds at a distance are also hard to get good focus unless there is a lot of detail.
Rent/borrow a good telephoto to get a good comparision. Your expections of the 18-200 are not realistic