= 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.
By Mike Johnston. The viewfinder is the single most important user interface on any camera. Throughout the history of cameras, the method of aiming the camera accurately and communicating its view to the operator is what has determined and defined most different basic camera types. Yet the viewfinder is perhaps the single most fudged and botched aspect of todayâs 35mm SLRs.