A laser rangefinder eliminates the guesswork of estimating yardage in the field, but the best units--with high-quality optics and complex technology for calculating bullet drop out to 1,600 yards--can cost more than your bow or rifle. The good news is that affordable options abound. I tested four $180-and-under models that claim to do the job at distances typically ranged by the average whitetail hunter. These affordable units won't let you count a deer's whiskers at a quarter mile, but they can range deer, elk, pronghorns, and other game out to 200 yards and mark larger, reflective features such as hills and trees at even greater distances. Here's how they stacked up.