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Message: <blockquote data-quote="PhilR." data-source="post: 3458281" data-attributes="member: 118722">Here in TX, warblers can often be found five to maybe ten or fifteen feet above your head.  At High Island, the tree branches are low enough to hit your head.  This means that warblers are sometimes close enough to hit with a tennis racquet, if one were so inclined (please don't do this, btw). This means that if one is using a 10x bino, that you will be changing focus quite frequently because warblers are constantly on the move and they constantly move out of your plane of focus.  The Canon has what I call an "adjustment period" where it "shimmers" a bit as you change focus.  In other words, it changes focus as you change focus.  And if you are constantly changing focus such as you would do for close-in rapidly moving objects (warblers are a good example, oddly enough), then the Canon is also constantly changing focus that tiny little bit.  You end up "chasing" the focus, so to speak.But don't take my word for it -- try it for yourself.  And yes, my "visual sensitivity" is very, very good.  And evidently is better than Denco's too.BTW -- I don't use a 10x of any type while in the woods at High Island.  That is where my 7x42 FL shines...........</blockquote>