When I was shopping for my Swaro EL"s I was torn between 8x & 10x. At Cabela's they had some posters across the store of some animals. They were small and supposed to represent a bear and I can't remember what at else at 500 yards. I didn't see a lot of difference between the two bino's. It was late in the afternoon so I stuck around to do side by side comparisons of distant objects outside as it was getting dark. I went with the 8's as there was a difference in their light gathering capabilities.