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Lil-Rokslider
I'm assuming a rifle elk hunt, since you mention optics being such an important part of your gear list? I think you're doing it right with those 8's. My experience has been that quality 8x binos will blow cheaper, higher power binos out of the water even at longer distance. That's only up to a certain point of course, 15's are hard to compare to 8's, no matter the quality of the 15's. I love the wider FOV you get from 8x glass vs 10x, and with those swaro's the edge clarity will be great, so you'll be looking at a bigger piece of ground when you set up behind the glass. I know you're planning on an elk hunt, but I can't tell you how many mule deer I've spotted in the outer edge of my FOV when set up behind the binos on a tripod. The slightest movement jumps out at you with clear glass.