I started to respond to this thread once, had to go, and then forgot about it. Sigh.
Thanks for the tip on a simple way to compare light transmission, Fred. Should I ever run into a salesman at a local gun store that I want to antagonize, I'll bring some tools.
What I had wanted to post is that what's more important than the 30mm tube to me lately is the objective diameter. It's not for increased light but increased resolution. Fred opened my eyes up to this about a year ago. I made a simple spreadsheet just for comparing scopes. I'll attach it below.
I don't pay too much attention to light transmission specs any more. I've found that I can see pretty well out of a lot of scopes in near dark conditions just by adjusting the diopter. Someone passed on that tip a couple of years ago here. It's been a while since I've been out hunting after dark, but I think you just adjust it -2 diopters from its daylight setting and everything will sharpen up clear as a bell.
Thanks for the tip on a simple way to compare light transmission, Fred. Should I ever run into a salesman at a local gun store that I want to antagonize, I'll bring some tools.

What I had wanted to post is that what's more important than the 30mm tube to me lately is the objective diameter. It's not for increased light but increased resolution. Fred opened my eyes up to this about a year ago. I made a simple spreadsheet just for comparing scopes. I'll attach it below.
I don't pay too much attention to light transmission specs any more. I've found that I can see pretty well out of a lot of scopes in near dark conditions just by adjusting the diopter. Someone passed on that tip a couple of years ago here. It's been a while since I've been out hunting after dark, but I think you just adjust it -2 diopters from its daylight setting and everything will sharpen up clear as a bell.