USM stands for Ultrasonic Autofocus Motor. These lenses offer manual focus override and fast, smooth and comparatively quiet ...

For more than 50 years, airports around the world have been designated by three-letter codes, that usually—but not always—refer to their cities like ATL, DEN, and LAX.

Clearwater's Roger Dawson joined the Army right out of high school in 1960 and learned to become a Morse code intercept ...