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Message: <blockquote data-quote="Bird spotter" data-source="post: 1618229" data-attributes="member: 80077">Burmkiller How do your 10 x 42's compare with your new 15 x 56'sDoes the extra power and larger objective lens make the purchase worth while.My reason for asking is that I'm in the process of "trying" to decide as to what magnification and make of binocular to cover bird watching as well as my other interest being aviation.Observing aircraft at high altitudes at times in order to identify make of aircraft and carrier.Taking note of the aircraft registration number would be a bonus but not likely to achieve this I guess with a pair of binoculars.Have compared 8.5 x 42 and 10 x 42 in which the difference in power wasn't really that noticeable but of course the field of view and brightness was.</blockquote>