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Message: <blockquote data-quote="ceasar" data-source="post: 3270496" data-attributes="member: 26155">I don't think I understand.  Let us assume the binoculars are all Leica Ultravids.   What kinds of problems would some people have with the 7x42 binoculars that they would not have with 8x42 and 10x42?The 7x42s have longer eye relief and larger exit pupils which make for easy eye placement when you use them.   They have greater depth of field which is very noticeable when you have to watch birds flitting around inside  tree canopies at distances up to 50 feet or so.  And they have much wider fields of view than the 8x42 and 10x42 do.  Those four attributes listed above all contribute to making it a binocular that is versatile and very easy to use.   In short, most people with experience using 7x42 binoculars will tell you that they are easier to use than binoculars of higher powers.Let me qualify that by stating that it is generally true but may not apply to all people.  I remember Elkcub commenting that his eye relief needs on his favorite 8x42 SLC and on his 8x20 Swarovski were different from many people because he was far sighted.  I can't remember his reasoning though.  Maybe he will read this and comment here?Bob</blockquote>