Re: 40mm or 50mm?
I was at a local gun shop and the owner said the Pentax rep. was in a while back and showed them the facts. He said all of their tests show no advantage of a 50mm obj. with the 1" tubes, the tube is just too small.
The 30mm tube was another story, it takes full advantage of the 50mm and and increase in light transmission was apparent in these. They said also, the fact is people like the big end and the have to make what people want to stay in buisness, a plain gimmick in his words and it sells scopes.
My brother bought a 5.5x22 Nightforce a few days ago and I'm in love with it after one time out.