What are the common specification terms used by binoculars?

• Field of view -  The extent of the observable world that is seen at a given time either through someone's eyes, the higher the field of view the wider the image your binoculars can produce.
• Magnification - For example a x10 magnification lens lets you view your subject 10x bigger than your naked eye could see
• Exit Pupil - Is the diameter of light that passes through the binoculars, the higher the exit pupil the brighter image you can see. You can compute the exit pupil by dividing the magnification power to the objective or front lens size. For example a 10x42 binoculars would give you an exit pupil of  4.2mm.
• Lens Coatings - Binoculars rely on the light received and these lights gets distorted as it passes through objects like glass. Binoculars manufacturers adds coating to reduce these distortions. There are multiple coatings available in the market, here are examples.

Fully coated. At least one thin anti-reflective coating on both sides of the objective lens system, both sides of the ocular lens system, and the long side of the prism.

Multi-coated. Multiple layers of coatings on one or more of the lens surfaces. Even some of the best optics available have only a single coating on the outside lens surface. This is done under the theory that a single coating is harder and more durable and the light reflected from the outer surface does not affect the image contrast.

Fully multi-coated. Multiple coatings on all lens surfaces. Fully multi-coated lenses are typical of high-end optics. Although this level of coating does not guarantee the best quality in image production, it is an indicator that greater care has gone into the design.

With some of the most used terms discussed, we will now determine which one is best for you by providing some sample activity/hobby you can do with your binoculars.

Birdwatching

Best to use at least an 8x42 or 10x42 binoculars for a clear detailed picture of birds. Since birdwatching is an activity that you might constantly move, a 10x25 compact binoculars like our KONUS VIVISPORT-25 10X25 would be ideal especially for kids so they can carry them for a longer period. 

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Astronomy

The basic concept is the higher the magnification the better both for magnification and lens diameter. Astronomy viewing happens on low light conditions the larger the lens size the higher the exit pupil would be which means the more light it can absorb, we recommend no lower than an 8x42 binoculars. 

We recommend our KONUS EMPEROR 10x42 for beginners who want to start astronomy viewing. Also, equipped with Fully Multi-Coated Optics to achieve detailed images even in lowlight environments.

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Nightvision Binoculars

Nightvision binoculars are always cool to have and of course the only tool we can rely on with certain hobbies like watching nocturnal animals or for tactical games use held at night. Our KONUSPY-11 NIGHT VISION BINOCULARS might just be the right nightvision binoculars for you. It is a versatile binoculars which you can use during the day as well. A cool feature as well is that It has photo and video recording function and it is already Supplied with A/V Cable, USB Cable, and 8GB SD-Card for Image Storing.

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With all the cool things you can do with binoculars, are you now ready to start a new hobby? Go on and pick up your new binoculars and go on an adventure this summer!

Steve,
Flashcards Team