Obviously glass quality and coatings also have a lot to do with clarity. I personally don't care for scope objectives much bigger than 42mm due to how high you have to mount them on the rifle. Look at most of your ballistic information concerning trajectories and they assume a scope centerline of 1.5" above the barrel. A 50mm scope sits up higher than this. Hence the reason Leupold now has some larger objective scopes especially designed to sit lower to the barrel. The other problem I have seen with the bigger objective scopes is when you have plenty of light out, say midday etc. This shows up more in varmint scopes, but could apply here. Unless you are going to only use this scope at dawn and dusk, they tend to let in an excessive amount of light during bright days. Can be a little bit blinding. Everything in life is about tradeoffs, and compromise.