= 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 reflex sight's reticle image travels from the sight body back toward your eye. Unlike a laser, you can point the sight at the open sky or at the moon and see the reticle just as well. You can use reflex sights just as easily at the weapon's maximum range as you can at 5 feet.A laser sight is limited in its useful range by atmospheric and lighting conditions.lectronic Sights; A look at why they exist, how they work, and how you use them. Photos with model: Oleg Volk. For this article, we define electronic sights as anything within the three general categories; reflex sights, holographic sights, and laser sights.