Thanks for taking the time to comment. They were not taken through glass. I have been asked that before with this lens it is a 300m F4 Nikon the older one perhaps not fully suited to the D300s.
May be worth tweaking the fine tuning, as they had a good reputation optically
How do I tweak the fine tuning.
Thanks for all the comments. The bird was swooping from the fence and chasing small birds. However the light was no where near good enough to get any shots of that. A special thanks to Martyn. I am about to go out on night shift but I had a quick look at the fine tune on the camera and will give it a go tomorrow.