Photographer Miguel Claro explains:
“The total lunar eclipse of 28th september was very unusual because coincided to the moon perigee (supermoon). At left, Capturing the sequence of the totality in the Canary island of La Palma, this little planet shows also the approximate size of our Earth when compared to the Moon, that can be seen at the right side of the image, in a close-up view of the same moment, showing its dark red color. Because of its closeness to Earth, a supermoon passes deeper into the shadow of our planet.”
In fact, the size of the eclipsed Moon image at right approximately illustrates the relative size of Earth and Moon, when compared to the circular projection of the eclipse sequence.