I recently bought a pair of the 8x30 Predators and love them! The clearity is great and I particularly wanted the autofocus. Also, the weight is easy to manage. You only have to adjust the diopter adjustments one time and you're good to go at any distance. The reason you have separate adjustments is each eye might see differently (glasses wearers can relate). You can fine tune each eye piece to the best clearity, so the overall picture you see with both eyes is clear.

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