I just returned home from hunting where I use Swarovski Bino's and I was looking at deer at Grey light with my Swaro's and I could see them but not all that well. So I pulled up my gun with a Zeiss scope on it and it seemed a heck of a lot brighter. Is it because of its a scope or are Zeiss glass really brighter than Swarovski's? If so what are reveiws on Zeiss binoculars?