Solar eclipse in Madrid. Projecting device (left) and projected eclipse image (non corrected for perspective).
Luis Fernández García <a href="//commons.wikimedia.org/wiki/User:Luis_Fern%C3%A1ndez_Garc%C3%ADa" title="User:Luis Fernández García">LP</a> / 2003-10-03.
CC BY-SA 2.1 es
<span class="int-own-work" lang="en">Own work</span>