Acually we are both right Stubblejumper.

The 30mm scope was originally made by and for European hunters that needed the extra light gathering capeabilites of larger internal lenses so they can see at night better. The true European made scopes are still made this way. Khales, Swarovski, Zeiss, and many others.

Many American scope manufacturers have "Americanized" the 30mm tube since we don't hunt at night. Many do use the standard 1" internal lenses and simple beef up the thickness of the main tube for strength and adjustment. Mostly on "tactical" and "target" style scopes. Some of the companies do make "European" style scopes with the 30mm tubes that do have larger internal lenses for light transmission.