Let’s look at a hypothetical situation. How many times have you been afield somewhere, either hunting or just “taking a hike” with your favorite firearm, and spotted a good target? That could be a deer, elk, tree stump, or distant rock. You pull up your binoculars to scan it, and it looks good. It’s a safe shot. The only problem is, you left your laser rangefinder in your truck because you thought you probably wouldn’t need it.