Personally I really like this lens. It's not my goto by any stretch of the imagination. but fun to use without a doubt. All these were shot with my K-5.
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This shot I caught at work. The antelope kept running to the fence and turning around and running back away and then back to the fence again. There was a train going by and I've never seen one do that. They are just normally to timid. When the train passed he finally ducked under the fence and headed off. When I got to the top of the hill, I had my answer to his actions. He had his harem on the other side of the tracks.
Anyway it's cropped quite a bit which explains the loss of detail but I was shocked on just how well he turned out given the magnitude of crop.