Originally Posted by
lensman57
A lowered powered bino, given the same objective diameter, will subtend a larger cone of light in to the eye and therefore is brighter and believe or not easier to pick detail on. The optimum cone size for the average human eye is about 7mm so full size binos of lets say 7X50 8X56 and 10X 70s are optimal for all types of viewing including astronomical work but quite bulky. So an 8X32 is much brighter and easier on the eye than a 10X32 and personally if I were to go for a 10 mag it would have to have a 42mm objective as a minimum.
A.G
Pretty much what I said, but perhaps more succintly put.
Happy Shooting!! Paul.
"We cannot solve our problems with the same thinking that we used when we created them" - Albert Einstein.