what does the 10-22x50mm mean ? is that 10-22 adjustable range — 2 Answers

Adjustable optics specifications are listed as A-BxCmm, where A is the minimum magnification (ex. 10x), B is the maximum magnification (ex. 22x), and C is the diameter of the objective lens, or the front lens of the optic which gathers incoming light (ex. 50mm). As far as binoculars go, 50mm is large, which is great for high magnification like these at 22x, since higher magnifications produce darker images. There do exist larger objective lenses, most notably binoculars by Celestron, but those are generally pretty massive, have extremely high magnification, basically require a tripod to use, and are intended for astronomy.