Raise binoculars to your eyes and you can see everything far away as if it was right in front of you. Often, manufacturers try to accomplish being inexpensive and being lightweight at the same time.
Modern binoculars come with a variety of coatings to protect the lenses and improve the brightness of the observed image. The magnification factor tells you how many times larger the object will be magnified, a number of between 4 and 7 is ample for most applications. Most pocket binoculars sport a double-folding design and an attached carrying case.
Generally, if the objective lens is 50 mm then it is considered to be a large binocular; if it is 42 mm, it is full size; if it is 32 mm, it is a mid size. You can buy bird watching binoculars for as much as a thousand dollars. Another important number describing binoculars is called field-of-view.
They can be extended or retracted as needed. My experience says you will need to spend at least two hundred and fifty dollars for a pair of binoculars worth having.
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