Digital memory cards are tough little things, but it's still possible to wear them out. At least in theory. But it's not a practical concern for the vast majority of photographers.

Unlike the days of film, airport scanners have no affect on memory cards, so you can safely put them through airport security scanners without holding up the line.

You might have heard recommendations that if you want the fastest and sharpest lenses you should use prime lenses. So what is a prime lens?