I just received my scope and I am trying to set it up. The optics are clear and sharp. At close range and low power everything is in crisp focus. When I go to high 20X and look at a tree out about 1,00yds it is blurry. I have 20/20 vision but use reading classes to read up close. The manual says to turn the rear eye piece to focus the reticle but it does not tell you how to focus the scope at long ranges. The adjustment on the side is for parallax not focus right? When I adjust the parallax knob it kind of sharpens up the image but it isn't in sharp focus. Do I crank the scope up to 20X and look at a distant object and turn the rear objective until it is in focus? How do the Leupold experts set up their scopes? gun) Thanks for any help you can give.