Delphinus, Up Closer

Why the funny shape in the image? Well, the shot was taken at f/4 which is only 1/2-stop slower than having the lens wide open. Consequently, there was some horrible lens distortion. Picture Window Pro has a "Lens Distortion" effect that can be used to undo that, at least partially. But the result is you get an image outline that looks like a barrel. Next time I shot a f/5.6 or slower. It's probably best to go all the way to f/8 for a sharp image, but that will also mean an exposure of at least an hour.