= 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.
Get the Best Viewfinder. By definition, a DSLR features an optical viewfinder that shows you the exact image the camera's lens is capturingâbut not all of these viewfinders are created equal. A mirror directs light from the lens to the viewfinder, which is one of two types.