How To Choose Bird Watching Binoculars

To choose bird watching binoculars, first look at the specifications. Aside from the brand name, there would be a number detailing the viewing dimensions, and the type of prism inside the binoculars.  Other things that can help you figure out what to look for include: the exit pupil, field of view, the lens coating, and the weight of the binoculars.

1. Bird watching binoculars are described by their viewing dimensions, for example: 7x35, 8x42 or 12x50. The first number is the magnification amount and the second is the objective lens diameter. When choosing bird watching binoculars, consider the type of bird you are looking to view. A higher magnification restricts the view but gives greater detail. The higher the magnification, the more you will have to pay for a good quality pair.
2. Look at the second number, which is the objective lens diameter. It measures the amount of light entering the binoculars, the bigger the number, the more light available and the better the image. However, it also means that the binoculars are heavier to carry around.
3. Calculate the exit pupil number, which is the objective lens diameter divided into the magnification number. This gives an idea of the light going through the view and reaching your eye. Generally, the higher the exit pupil number, the better the binoculars, especially for low light settings and for older adults.
4. Think about how much you want to spend and where you may be going. Bird watching binoculars come in two forms based on the prism layout inside. The Porro prism binoculars are the least expensive; however, they are prone to damage. The Roof prism binoculars are streamlined in appearance and portable, but they are expensive in comparison.
5. Lens coating comes in a variety of forms from coated to fully multi-layered coating. This is where of the lenses receive anti-reflection coating. Choose bird watching binoculars that come fully coated so that all their lenses are covered at least once to prevent glare.
6. The field of view describes how much of a view you get. It is listed in either degrees, per 1000 yards or per 1000 meters.  If a binocular set is described as having 300 feet, it means for an object 1000 yards away, you can see 300 feet of it through your eyepiece. If you need to watch a flock of birds, choose bird watching binoculars that give you a larger number of feet per 1000 yards.