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Will, what do you want to use them for - astronomy?
on a US forum the 18x50 is not liked - , the 10x30 isn't popular either, the choice of the range is the 15x50 for astronomy, and 10x42 - the best allround i think for both terrestrial & night sky - if you want dual purpose
apparently the optics are excellent - and the IS works a treat (usually at 10x mag and above you need a tripod to keep binos steady)
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