When buying binoculars, the most important thing is figuring out what your primary use for thebinoculars  is going to be. From bird watching to watching your favorite sport from a stadium seat, binoculars are useful tools to have around.
1*.Birding
In low light situations, i.e., birding in forests or woodlands the popular 10 x 40 binoculars with narrower fields of view, are too powerful in these situations. The 7 x 35 gives you a smaller bird in a bigger picture frame but has lots of sharply-focused habitat around the bird giving you the ability to better observe the birds behavior. In normal sunlight and at farther distances the 10 x 40 is a good choice giving you a spectacular image at long distances.

2*.Stadium Viewing
Watching your favorite sport from a stadium seat. 10 x 40 is a good binocular for this perfect for focusing on one person on the field. Although for a wider field of view though I would suggest the 7 x 35.

3*.Quality and Price
In almost everything we buy nowadays, quality is a key word. Purchase a brand name product, and you'll be sure that the binoculars will last on the long run, and give you a better quality view. Go for the top ten manufactures of binoculars. You wont be disappointed. The price is a large factor also.