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Nikon 7245 Action Ex Extreme 10 X 50 mm All Terrain Binoculars Review

Updated on May 12, 2011

Nikon 7245 Action Ex Extreme 10 X 50 mm All Terrain Binoculars

Nikon 7245 Action Ex Extreme 10 X 50 mm All Terrain Binoculars

Nikon 7245 Action Ex Extreme 10 X 50 mm All Terrain Binoculars


Picking binoculars is one of those things that leaves a lot of people confused. You will need to understand numbers like 6x30 when you go out to buy a pair. You will also need to be able to think about any special features or any of the specialized types like compact binoculars or stabilized binoculars. The main thing to making the best decision is to keep in mind how you are planning to use them, and then the rest should come together nicely.

Read More Reviews of the Nikon 7245 Action Ex Extreme 10 X 50 mm All Terrain Binoculars


By far the two biggest things that you are going to need to keep in mind when you are picking binoculars are the magnification and the lens diameter. These are clearly marked on all binoculars with a number like 7x35 or something similar. Magnification is shown by the first number and that is just how much closer an object will seem. The second number will let you know the size of the lens in millimeters. The field of view is going to be wider if you use a bigger lens diameter.It isn’t just a matter of picking the binoculars that have biggest numbers, that would be much too easy. It can be hard to pick up moving objects if you have a high degree of magnification, so that may be something you want to avoid for some uses. Having a large lens diameter will give you an outstanding field of view but it will also result in large and heavy binoculars, not something you want if you are going to be carrying them a long way.


The next big consideration when choosing binoculars is the brightness, the size of the exit pupil will determine this. If you divide the lens diameter by the magnification you will find the size of the exit pupil. More light will reach your eye if this is a large number. This is something you want if you use your binoculars when it is dark but it can be a problem if you are using them when the sun is shining. For use in the daytime or general purpose binoculars an exit pupil size of 3 to 5 mm is perfect but for nighttime use you are going to want an exit pupil of at least 7 mm.


Comfort level will largely be the major consideration in most of the other factors that you will need to keep in mind so there are really no general rules. Things like how you focus the binoculars or what type of prism is used can be a big deal to some buyers while other people really won’t care. You are also going to want to think about any of the specialized types of binoculars that may need like water proof binoculars or marine binoculars. The best way to make certain that you get theright choice for your needs you will want to make sure that you think about how you intend to use your binoculars.

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