I studied the image in my 4.5-18 LRTSi next to my old Bushy ERS, a SightronSIII, a new Tango 6, and my Gen 3 Kahles. Did one round while it was bright, the next while over cast.. read license plates at 400, and picked out objects to 1600+. The glass is good, very good for the price. It crushes...