At one time I thought I might be able to shoot wildlife with my 500mm mirror lens. After trying I realized this was not realistic.
But the ring bokeh typical of mirror lenses would look really cool in shots of birds flying over water, so I faked it.
To create this image, which a single shot with a mirror lens could have done if mirror lenses were sharp, required two professional cameras, two RAW images in four layers, and about an hour fiddling around in Photoshop.