06 inches, which may not be that A lot in case you Evaluate it with other scopes on this record. In addition to that, its battery life also tops out at 5 hrs. So you will need to have battery backup with you When you've got it on the field. https://lightweight-infrared-scop19528.verybigblog.com/27444343/5-tips-about-infrared-telescope-you-can-use-today