Zoom Binoculars: 5 Fast Facts

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Fact #1. Modern zoom binoculars are a pair of powerful telescope lenses adjusted to be used with both eyes. As such, the history of binoculars actually goes all the way back to the first telescope. A man from Holland is credited with the invention of the telescope somewhere near the beginning of the 17th century.
Fact #2. The first true binocular telescope was invented in 1825. It was used by the U.S. Navy in the Civil War. It was replaced as the most defining invention in binoculars, the Porro prism, was developed in the 1850s. The Porro prism paved the way for all modern binoculars, and is still used to this day.
Fact #3. Zoom binoculars vary greatly. Understanding the differences between their features can help to ensure you purchase the best model. The first thing to be aware of is magnification numbers. Higher magnifications are best for looking at objects that are extremely far away. Another consideration is objective lens optics. Bigger objective lenses mean more light and a brighter image.
Fact #4. Some models are equipped with a rubberized shell meant to take a beating and still operate. This additional armor may increase the size, weight, and price. Users who need a simple pair of binoculars to use from the safety of their stadium seat may favor a lighter, unprotected model. Other models are waterproof. This is important if you intend to use them in high humidity or in an environment with frequent rain.
Fact #5. Field of view is another factor for many users. Just as with normal vision, a wider field of view is more desirable for people who need to follow something moving across their viewing area. This could be a ball at a sporting event or quick moving wildlife. For people who usually view stationary objects, it's not as important.