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Message: <blockquote data-quote="brocknroller" data-source="post: 1929868" data-attributes="member: 665">I think you are going to be disappointed if those are your expectations. A 10x bin will not give you a better 3-D effect than an 8x bin in the same configuration nor will it have better DOF than the 8x bin. DOF decreases as magnification increases. The reason Zeiss 10x40 might give you a better 3-D effect than your compact and midsized 8x roofs is due the barrels being wider spaced. All of the bins in your signature except the Mikron are roofs, and to boot all of them except the 10x40 are midsized or compacts. The closer set the barrels, the less 3-D effect. If it's a 3-D effect you're looking for you would be better off with a full sized 7x or 8x roof, or better yet, 7x or 8x midsized or full sized porro binoculars.The 7x36 ED2 gives a fairly good 3-D representation for a roof, but the 9x36 will not be as good in that regard as its 7x sibling. But you will see more detail (if you can hold the bin steady) and get a larger image of the bird. Brock</blockquote>