I have the Elite 4200 4-16X40 and at leagal hunting times 1/2hr before sunrise and 1/2hr after sunset it is more than bright enough to make out a deer just peeking put out of a tree line. THis scope seems to take a pounding as mine had lived on a 300RUM and not one hichup. I don't know if the cost for the 50mm is worth the differance between the two 50mm and 40mm.