For just a set of 8x42 monocular, the exit pupil is 5.25. Try to look for an exit pupil of five or increased if you need to make use of them in low light. With 4X magnification , the detection selection around hundreds yards, and also the recognition length approximately https://edwiniylxh.vidublog.com/27699472/not-known-factual-statements-about-thermal-monocular