I just look at them for now. I have an 80mm x20-x60 field scope and intend to couple that to a camera and take up digiscoping at some point in the near future...
Wild nature photo shooting is an expensive hobby. No wonder many real wild life photographers quit, because of widely available game parks where you can make a close-up photo of a bear, tiger or a lynx. No 400+/2.8-like lenses necessary.
