Since these binoculars will be used outdoors, possibly in rough terrain, it is important to look for a pair which is built to last and stand up to the odd fall or scrape. Night-vision binoculars are one of the most popular products in the market.
When beginning a day of binocular observations, it is tempting to leave the binocular case in the car or at the base camp and rely on neck straps or other attachment mechanisms to secure the unit. It is important to protect binoculars from dust, mist, rain, fog, moisture, sunrays, fire, and fingerprints. If you are going to use the binoculars yourself go for a higher quality optics which naturally would cost more.
Cost is another factor to consider. Apart from magnifying images, binoculars offer other functions also.
The range of you binocular depends on three things, its gain, resolution and magnification. The more important consideration should be the field of view. Binoculars with a magnification power greater than 10 will be difficult to hold steady.
Binoculars allow you to take in all of the details from a distance. Also be aware, that night binoculars cost much more than ordinary binoculars.