There is another area the 10x42 had an advantage over the 8x42 and you seldom see it mentioned. The extra resolution of the 10x over the 8x in low light gives the 10x advantages when trying to identify the quality (antlers) of game animals. I learned this the hard way while running a premium 8x42 against my friends premium 10x42 on a trophy deer hunt. This advantage is expressed in the twilight factor. The 8x is brighter but has less resolution / lower twilight factor than the 10x42.
I agree. Our own Mule Deer, with his years of experience with many different brands and configurations of glass, posted virtually the same findings a month or so ago. IIRC the many 24HCF experts chimed in to tell him how much of a dumbazz he was. I'm a dumbazz as well because I agreed with him too.
I will add that the older I get, I don't see that much difference in brightness between 8x42's and 10x42's of the same quality.
