= 12. Semi-Interquartile Range. The semi-interquartile range of a distribution is half the difference between the upper and lower quartiles, or half the interquartile range. Therefore, from the example above, it was determined that the interquartile range = 12.
Electronic Viewfinders (EVFs) An EVF is basically a very small screen inside a viewfinder, so you can put your eye up to the viewfinder and use it like a traditional camera. On most cameras with EVFs you can switch the view between the viewfinder and the rear LCD screen interchangeably.
The focusing method used when looking through the viewfinder, not the LCD. In the Canon T4i when you focus through the viewfinder you use what I call the big brains of the camera and the focusing method used is called Phase Detection. So how does the two new STM lenses compare with a USM. Real Quick Definitions.