No doubt you can see more detail with IS, but the view of the bird isn't as nice as with a normal 8x42 because of less contrast and brightness. One time I was looking at a Robin with my HG 8x42's, and I was taken aback by the beauty of such a common bird, but then I looked at him with my Canon 10x30 IS-II's and I thought what happened? The Robin was steady, but I couldn't see the contrasting colors and bright red breast on the bird's under belly that made him so beautiful through the HG 8x42's. What you gain in detail with an IS binocular, you lose in the quality of the view.
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