Originally posted by Atindra What I find strange is 1/100 and 1/200 shutter speeds under the bright sun. Which mode you are using? Because in Nikon shot at f/7.1 the shutter speed is at 1/1000 (as the sunlight is very strong in that shot).
Good point. I wonder how he was getting such slow shutter speeds in full sun at the stated aperture and ISO? Was there perhaps an ND or polarizing filter involved? What kind of quality are talking about?
Anyhow, I agree the tripod shots look "normal", suggesting the lens itself is fine, so it's either camera shake despite SR, or missed focus (I wouldn't guarantee the camera focused exactly where the crops come from) - either of which could be a camera problem but are just as likely user-caused.
EDIT: missed the followup where the OP specifically mentioned the polarizer and wind. That explains the low shutter speeds. Might also explain some of the overall softness if it was not a high quality filter. And the relatively slow shutter speeds combined with the wind explains the rest.