When Aaron and I were trying to get photos of the ospreys there were a couple of times that one would fly directly over us. This shot was taken using the Nikon D700 and the Sigma 150-500mm lens at 500mm. The bird was directly over head and I was shooting straight up. This is the photo as it was taken with no cropping what so ever.
As a side note. For those of you interested in photo software you will be interested to know that the NIK software has come down drastically in price. Aaron made me aware of this fact this week. Google bought out NIK and is now selling the software, the full version which used to cost over $500, for a measly $150!! Apparently there are some coupon codes you can find on the internet that will save you another $20 on top of that.
If you've ever wanted this software now is the time to get it (Paul, are you paying attention?). Aaron also told me about a free version that is an app for the android phones called snap seed. I downloaded that to Cheryl's tablet today so I could use it when she's not looking.