When you're looking for a rangefinder, it's important to have an idea of a few of the fundamentals of laser rangefinders from the beginning. Before we had laser rangefinders, we had much inferior optical rangefinders whose accuracy varied with the distance and which often gave inconsistent readings from one user to the next. They were also large and cumbersome for field work and rather slow to operate. As to accuracy, they were crude by today's standards, though certainly better than a guess. Because of these shortcomings, most folks tended to go without a rangefinder when they headed to the hunting field or golf course.