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I tried Swarovski binos in a large outdoor store and was blown away.

I've used a similar pair of Nikon binoculars to the ones in this thread. My Dad bought them in the early 1980s to take on safari in Africa. They are a joy to use. I have some of the newer, cheaper...

The first number is magnification. So Images in Bob's pair of binoculars appear 8 times closer. I think the second number is the diameter of the lens. The large the lens the more light is gathered...

It's field of view, I believe
https://www.eagleoptics.com/pages/field-of-view