Binoculars are necessary when bird watching but there are some things that are important to know so you will choose the best ones to enhance your experience. One of the first things that you need to consider is the magnification specifications and size of the objective lens.
There are also some specific features you need to consider that include:
• If you are using the bird watching binoculars while wearing sunglasses or regular eyeglasses you should look for a pair that gives you fifteen millimeter or more of eye relief. This refers to the distance the images are projected from the ocular lens to what you are looking at. This measurement can range from ten millimeters to twenty-three millimeters.
• Close focus of three to six feet will help you observe dragonflies, wildflowers, and butterflies better but to watch birds you should have a close focus of at least ten feet or less.
• They should be fog proof and water proof so you can use them in any type of weather and around water
• Although these are more expensive you should look for ones that have high quality lens coatings, prism coatings, and glass to give you better resolution. This will allow you to have a cleaner, crisper image, vivid colors, and better contrast. The more you spend on your binoculars for bird watching the better the quality of the glass, which equals better images.
The size and power of the binoculars are defined by numbers with the most popular choice being a full-size eight x forty-two pair for watching birds. There are many different reasons why this size and power are so popular.
The first number, which is eight, means this is the magnification and will enable you to see something eight times closer than you would see with your naked eyes. Some prefer a ten magnification but the images they give you are not as bright and they are harder to hold steady. The magnification also affects your field of view, which is the distance that is seen from side to side. Generally the higher the magnification the more narrow the field of view. When trying to follow the movement or locate a bird it is beneficial to have a wide field of view.
Size of objective lens
This would be the second number listed, which in the example above is forty-two. This is the size of the front lens, also referred to as the objective lens. It is measured in millimeters. The objective lens is the one that gathers light so the bigger it is the brighter the image will be. With smaller lens there is less light gathered so it makes it difficult to see any details of the birds, especially if there are low light conditions. When bird watching many times it takes place under a canopy of trees or in the woods where there is not much sunlight. Birds are also more active during dusk and dawn so you should have a larger objective lens.