ISO test .... Nikon 300s + F4 300mm.

Well after sunset, ISO 3200, Barn Owl flying away, fairly crisp image ........ maybe next time I will get  the bird flying towards me !. ...... 

F2.8 lenses are really the best for this sort of low light photography.

The thing with Barn Owl photography is that there are no guarantees when they will come out or where but rewarding if you can get it right ..... which I didn't quite manage this time..