I played with the curve to achieve more purple color. It was on a place were normally is water. The moss was a kind of brownish, so with a litteldesauturation, I've got this picture.
For this kind of photography, I always carry a garbage bag with me to lie on the ground.
The mirror lens is not that long compared with my other lenses.
It's about a 20cm long, but indeed looks like a barrel with a round little mirror on front of the lens glass.