On another forum not related to photography I started a series of "What is This" for folks to identify. It has become popular with many folks there. The first pic would be a very close shot & then after some guessing another shot backed off & then another until the subject was identified. Here are some of the "first shots" taken with an old Minolta "mc" mount 55mm/1.7 plus extension tubes on my Panasonic G1. 1. frosted corn flake 2. a peppercorn 3. aluminum shavings off a drill bit 4. steel dust on a magnet 5. a rat tail file All the above were identified, some even on the first pic.