They manufacturer, if honest, will tell you the 30mm and the 1" both have the same erector tube and that the 30mm version is to give you more adjustment range within the 30mm main and there is not a difference in brightness.LongRifles said:Call a scope manufacturer and ask this question:
Take two scopes with identical features except the main tube diameter of one is 1" in diameter and the other is 30mm (1.181") in diameter.
Which will appear brighter to the eye when they are looked through?
This is so obvious James Brown could see it.
Tell me, how does a 30mm tube provide a brighter image when it has the same erector tube in it?