Meets challenge, pretty good focus but it falls off in the corners. If it were me, I'd have the columns lined up perfectly parallel to the sides of the frame.
Is this the surface of a ping-pong paddle? I like the shot, but wonder what it would have looked like if taken at a steeper angle and with a shallower depth of field.
Cool!. A little grainy, not too bad though. Interesting lighting on the dimples (or pimples rather? dimples are depressions in the skin...) makes the pattern more interesting and makes nice shadows.