1.   Momentarily her mind was a confused blank, then, like taking a lens cap from a camera, everything came into clear mental focus.

2.   You open the lens cap.

3.   And the detachable lens cap is a pain.

4.   Even the lens cap finds its way into the picture.

5.   For instance, lens caps that cover sensitive instruments during launch must be jettisoned once the satellite has settled into an orbit.

6.   It also comes with more odd features than you can shake a lens cap at, but no lens cap.

7.   Nobody ever got rich accusing Stanford University football coach Bill Walsh of being unable to hear a lens cap hit the snow.

8.   Then he removed the lens cap.

9.   There is no lens cap to protect the optics while the device is in your pocket.

10.   He just took off the lens cap, and put it back on when it was time.