I'm getting a new spotting scope in a few weeks. Currently I'm looking at Swarovski and Zeiss. I am curious about the size of scope you backpackers have chosen to use. I think I would prefer the 65mm scopes to the bigger 80mm scopes because of the size and weight. But I am interested in hearing if any of be live the bigger heavier scope is worth packing around. My other concern about the big scopes is they get moved around more by wind than the smaller ones.