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Message: <blockquote data-quote="Binastro" data-source="post: 3243444" data-attributes="member: 111403">. Although I said that the 10-25×42 waterproof zoom binocular was not very good optically. This was when I tried it for astronomy and general use.However, I just tried it for macro use at 25 times, which I presume is fairly accurate.The closest focus that I can get, being longsighted, is 75 cm from my eye or 57 cm from the front of the monocular. It is impossible to hold it steady, so I think that one would have to use a tripod. I don't need glasses.Looking at a glass of water at the closest distance, the bubbles are very well seen.But if somebody needs to wear glasses, then the field is much restricted at 25 times. But maybe with an exit pupil of around 1.7 mm glasses are not needed?. It is possible that this is a useful instrument, although the 10×42 may focus closer and probably has better optical quality and a wider field of view.</blockquote>