Put on your thinking caps. You can have as many guesses as you want ….
Spoiler alert: do not read any further if you want to try and work out the answer.
I do not crop, enhance or post-edit my images in any way. Shot with a Pentax K100D, using a Sigma 70-300mm lens. F8, 1/180 sec, ISO 200, focal length 300mm.
Featured in TIME TO WATCH CLOCKS, April 2010.