Zoom is in Russian "scale" or "measure of approximation . " The word zoom is English, you can translate it as "focusing". Therefore, zoom in means "approaching", and zoom out means "distance".
The word zoom is actively used in the context of photography and video. Equally important, this term is also in digital cartography, where for each map at a given time a certain scale is set - it's the same zoom. If we are talking about digital gadgets, the optical zoom of the camera is a very important parameter that affects the quality of the survey. Optical zoom should be distinguished from the electronic zoom, when the zoom effect is not created by optics, but by the increase in pixels.
The zoom is in the list: Slang