Back in the days of 35mm film, a 50mm prime was considered a 'standard' lens. That's because it gives pretty much the same perspective as viewing a scene with the human eye, without the magnification of a telephoto lens or the shrinkage a wide-angle lens uses to squeeze more into the frame.
The flexi disc (also known as a phonosheet or Soundsheet, a trademark) is a phonograph record made of a thin, flexible vinyl sheet with a molded-in spiral stylus groove, and is designed to be playable on a normal phonograph turntable.
Credit: Laptopmag.com View full size image. View full size image. The Fitbit Flex is an activity tracker aimed at measuring your exercise, diet and sleep. The device was my constant companion for about a week, and by the end of it, I felt informed about my activity levels, and was motivated to get moving.