@Philip Glass thanks for the video. The two cameras at different angle, certainly gives it a professional quality. While I agree with a lot of your comments and observations, I do want to offer some differing views on a couple of things.
The term "light gathering" is a bit of a misnomer and firmly embedded into "conventional wisdom." The real physical property that matters on light transmission in a scope or binoculars is "exit pupil." A variable scope will have a range of exit pupil, since it is the diameter of the objective lens divided by the power setting. So it you have a 1-8X by 24mm, the range of the exit pupil will be 3 to 24. So if the scope is cranked up to 8 power (exit pupil = 24mm / 8 = 3) and there isn't enough light to see, then lowering the power a bit will increase the exit pupil and at some point you might be able to see. Yes, a larger objective lens helps to give you sufficient exit pupil at higher power settings. The human eye becomes the limiting factor, particularly as we age. That limit varies, but for 60+ old geezers, it's around 4 to 5mm exit pupil.
One other comment on "Leupold." For whatever reason, many Americans (myself included) grew up pronouncing it "Lee-O-Pold." Several years ago, while watching TV hunting shows, I noticed the Leupold commercials pronounced it "Lou Pold." I figured they were getting it right and the Lee-O-Pold we all learned from Granddad and dad was incorrect.