0214-08-20 Macro – Calculate This!

At one time engineering students had to have one of these…

What do you think this is a close-up picture of?

Hint: One part moves.

Think you have it? OK, click here to find out.

Colophon

Macro Photo: Nikon D90 with AF-S Micro NIKKOR 105mm 1:2.8G lens. ISO 560 f8 at 1/125 sec.

Full Photo: Nikon D90 with AF-S Micro NIKKOR 105mm 1:2.8G lens. ISO 500 f8 at 1/125 sec.