I took the tokina SD 400mm to the Spinnies, always a good bet for test pics of birds on the feeders. It was a cloudy morning, light was dim, and results weren't that inspiring, I deleted most of them. But at the other hide - a bonus. The water rail was scampering out of the reeds to pick up the droppings from the feeders. All f8 (ish).
Bit of motion blur on this one.
Couple of sample pics off the feeders.
This snipe was at Conwy RSPB, big crop.
It's certainly a pretty good lens, I think I get more out of my FD 400mm f4.5, and my adaptall 300mm f2.8 + tc. I'm thinking particularly of the detail from a big crop like the snipe pic (though looking at that snipe pic again you could argue it is slightly back focused).