YEP it does ...
But more importantly its the coating on the lens that increases light transmition...
a 36mm scope that has fully-multicoated lenses will let in as much light as a 50mm lens that has no lens coating at all...
ORIGINAL: LBRB45
No guys i realize a 50 mm is bigger than a 40 mm but what does the bigger lens do? Does it just let more light in?