Because ours is an evaluation of sporting optics, we test them the way you use them, by measuring low-light clarity, by mounting them on rifles and tripods, and by carrying them around our necks. But we take our test a step further, measuring each product's optical clarity using an Air Force resolution target. And then we live with these products, taking them into the field and testing their utility. Half of our score is derived from measured performance (low-light and resolution tests, and for riflescopes, the precision and repeatability of windage and elevation controls, and reticle visibility). And half is our panel's subjective evaluation. The highest-scoring optics win our Editor's Choice award; the products that represent the best value win our Great Buy award.