I got that feeling the other day when taking the photograph I offer above. It wasn't the same feeling that I had when taking the shots noted earlier. This time it was principally surprise that I felt because the image I had recorded was so very hard to decipher! Part of it was clearly out of focus, and part of it was as sharp as could be. It was hard to work out what was near to the camera and what was most distant. I showed it to my wife and she couldn't work out what it was. "Is there a lot of rust in the image? Are there shadows?", she asked. Can you see what I photographed?
In fact, the shot shows a section of the seat of a curved, slatted, stainless steel bench. The brown stripes in the photograph are the out of focus concrete below the seat, and other stripes are the metal slats. The shadow of the back of the seat falls across the seat slats which themselves vary in colour according to the amount and angle of the light falling on them. I used a short zoom, to take the shot, and gave it a symmetry that only the shadows broke. A great shot - no. But an interesting illusion - yes, I think so.
photograph & text (c) T. Boughen