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Interesting Terms and Facts About Binoculars

By Brian Schwartz

To most people, one pair of binoculars is the same as any other. It's important to realize, however, that a good quality binocular will give you clearer, brighter vision, and stand up to elements such as water, heat, and cold. You should choose the model that best fits your magnification and durability needs. There is a plethora of binoculars information available on the web, but here is a quick glossary of interesting terms and binocular facts you should know before looking.

Alignment: Also known as columnation, this term deals with the way the optics and mechanics work together.

Central Focusing Wheel: This is the dial in the center of the binoculars that lets you adjust the focus, which can change depending on how far away the object is or if your vision is different from another user's.

Coatings: The lenses are coated with pf substances, which help transmit light and decrease reflections.

Exit Pupil: This is the circle of light you see when you look into the light. This has no impact on performance.

Eye Relief: In mm, this is the distance from the lens to the point where the object is in focus.

Field of View: This describes how much you're seeing. If you're close up, your field of view is small, and vice versa.

Fixed Focus: Some manufacturers fix their lenses in place, making it impossible for you to focus them. This will cause difficulties for those with vision problems.

Focusing: This is simply the manipulation of the position of the lenses in order to bring the image into focus. You can choose from either central focusing, which focuses both eyes at once, or single eye focusing.

Low Light Capacity: This refers to how well the binoculars transmit light. They must have a rate of 90% or higher to have low light capacity, allowing you to see at twilight.

Magnification: This is simply how many times larger or closer the image will appear to you through the binoculars.

Objectives: The large lenses in the binoculars, which some companies use two of.

Porro Prism Binoculars: The prisms here are offset from the eyepieces, making for better 3D viewing.

Resolution: This refers to how well the binoculars sharpen small details.

Roof Prism Binoculars: This is when the prisms are in line with the rest of the optics.

Stabilized Binoculars: These are specially built to stabilize the image when your hand or tripod is shaking.

Variable Optics: These allow you to adjust the magnification, though a large magnification will result in a smaller field of view.

Waterproof/Fogproof: These types of binoculars can be submerged in water, where Splashproof binoculars cannot. Be careful to ask about this specifically- just because the binoculars have a rubber coating, it does not mean that they are waterproof.

Before you buy your binoculars, make sure you research binocular facts and determine what activity you will be using them for and what specifications you will need, for instance, magnification strength and waterproofness. Knowing these requirements will help you to pick the best binoculars for you quickly, and help you make an informed decision with all the binoculars information available.

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Article Source: Brian_Schwartz
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