I have the Vixen version of these (2x40 or something like that). They're fun and add to the experience at a dark site. The experience is less similar to regular binoculars and more like naked-eye - but on steroids. Having said that, these were a present, and I probably would give them a miss and spend the money on some other kit instead.
They really come into their own under properly dark skies. Any skyglow - meh.
A discussion of these binoculars
here suggests that the large aperture is actually needed to get the FoV, rather than a particular exit pupil:
Quote:
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Field of View. In a Galilean system, the field of view is directly proportional to the aperture of the objective lenses. That's why these devices have relatively large lenses for their modest magnifications.
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