Field of view is the amount of area that can be viewed through binoculars. The amount of area is the total left-right footage seen by your eyes through the binoculars.
It is important that you choose quality binoculars based on how you intend to use them. There are best thermal scope that are designed for several different hobbies, such as stargazing, bird watching, hunting, and horse racing. The strength and clarity of the binoculars will need to be better in some instances than in others. For that reason, it is essential that you consider what you will be using them for when investing in a pair of binoculars.
Whether you need a set for sailing, bird watching, hunting, astronomy or even to watch a football game from a distance the Nikon 7245 Action Ex Extreme 10×50 mm All Terrain Binoculars are a perfect choice for all these.
All binoculars are labeled with a power and an objective number. Ex. 8 x 32mm. The first number is the power, the second is the objective or diameter of the objective lens (the large lens opposite where you place your eyes).
Like most of the other questions, this depends on your use of the binoculars. If you are hiking through the woods hunting for the day, you’ll want binoculars that don’t weigh you down too much. If you are staying in one location to do some bird-watching or checkout some scenery, you might not need the binoculars to be as light.
The other number refers to the aperture, or the width of the lens that will be collecting light. The higher the number, the brighter the image will be when seen through quality binoculars. If you will be looking at the stars or using your binoculars in other low-light situations, you will want to opt for a higher number. The trade off for a brighter picture is a heavier and larger lens. This may be a problem if you are hiking and lugging around a heavy pair of binoculars.
This might seem trivial at the first thought. But, it’s got clear influence on the degree of clarity of your view. The binoculars’ exit pupil actually is an amplified view of whatever image you’re seeing in the binoculars eye-piece. For getting the finest image from bird binoculars, you’ll need a quality exit pupil, which is not below 4mm.