Young or old all would agree that it is impossible to bird watch with out a pair of binoculars. You won't be able to go to a sports game, a show or concert or even to the beach without them.
To correct this, two prisms are placed inside the binoculars, between the objective and the eyepiece. Those who have little room to stow prefer a monocular over a binocular. All other things being equal, the larger the objective diameter, the brighter the image you see through the binoculars.
An ounce of prevention is worth a pound of repair. In those days monoculars were used in sports and as a defensive device during wars. Heavy scrubbing or wiping with unfriendly cleaning materials or cloth might damage these coatings, so using the right binoculars lens cloth is important.
The range of you binocular depends on three things, its gain, resolution and magnification. Capturing as much of that as possible is good as it means all the available light is getting to where you want it. The more important consideration should be the field of view.
There are also models with compasses built in, to keep you always on track when camping. If field-of-view is important to you, don't purchase the most powerful binoculars you can find.
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