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Digital Binoculars

Updated on May 12, 2011

How to Choose Digital Binoculars

Many people find buying digital binoculars confusing. It is important to be familiar with numbers like 6x30 when you go out to make a purchase. You are going to have to keep in mind any special features or any of the specialized types like compact binoculars or marine binoculars. If you keep in mind what you are planning to use the binoculars for everything will fall into place fairly easily, so this is something you will want to think about before you start looking.

By far the two biggest things that you want to consider when you are buying digital bincoculars are the magnification and the lens diameter. These are clearly labeled on all binoculars you will see a number like 6x30 or something similar. Magnification is determined by the first number and that is just how much closer an object will appear. Lens diameter will be the second number and it is shown in millimeters. The bigger the lens the larger your field of view will be. Unfortunately it’s not simply about buying the binoculars with biggest numbers, that would be way too simple. It is difficult to pick up moving objects if you have a lot of magnification, so that may be a problem for a lot of uses.  You will get a great field of view if you have a big lens diameter but it comes at the price of very large and heavy binoculars, not a great idea in a lot of situations.

The brightness of a pair of binoculars is determined by the size of the exit pupil and this is another important thing that will need to be considered. If you divide the lens diameter by the magnification you will determine the size of the exit pupil. The larger the exit pupil is the more light will make it to your eye. This is something you want if you are using your binoculars when it is dark but it can be a problem if you use them when the sun is shining. For use at night you are going to need an exit pupil of at least 7 mm. However if you plan to use them in bright daylight 3 mm is probably ideal, 5 mm is a good compromise for a wide variety of uses.

There are a few other factors that you are going to have to keep in mind but these are for the most part just down to what you feel comfortable with. Some people consider things like the prism or how the binoculars are focused are major issues while other people could care less. You will want to think about any of the specialized types of digital bincoculars that may need like compact binoculars or night binoculars. Keeping how you want to use the binoculars in mind should help to make sure that you make the best choice for your needs.


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