BBobinNH,
Don't know why folks have a tough time seeing this happen.I saw it again just yesterday on deer stand with a Leupold variable.....complete "glare out" as I looked into deep shadow with the sun just clearing the tree tops facing east.
I know it isn't a real test but I raised my Swaro 8x30 bins and looked in the same spot.....I could "see" with those.
Did you and I graduate from the same optics school?
We both compare our optics with our optics; whatever they are.