Originally Posted by
bbbagman
He said that you didn't necessarily have to have the 50mm to transmit more light. He said something about the ratio of the magnification to the objective size ... ie a 2.5 magnification to a 44mm scope loses less light than a 6 magnification to a 50mm scope. At least that's what I came away from our conversation with.
Basically correct! But you give up magnification for clarity There is a good deal of difference between 2.5X and 6X!