The first thing that you need to look at when choosing a pair of Celestron binoculars is the size. Generally, binoculars can all be broken down into 4 different sizes: full size, mid-size, compact, and monocular. A full size pair of Celestron binoculars will have a lens of 40 mm or more. They are able to take in more light so you will get a better image. The magnification amount may vary but they typically will let you get a steadier view of the object and a wider field of vision. That means you aren’t going to have to deal with as much shakiness even with a massive magnification. These full sized Celestron binoculars typically weight about 1 kilo (about 2 pounds). Mid-sized Celestron binoculars are in the 30-39 mm range and are the best choice for all purpose use, such as bird watching or going to sporting events. They are still going to be too heavy if you want to take them trekking though. The Celestron binoculars in mid-size usually weigh about 800 grams. Compact Celestron binoculars are less than 30 mm. They are great if you take your binoculars trekking and are more comfortable if you need to wear them for long periods of time. They can weight as little as 350 grams. Celestron monoculars are the smallest because they have just one scope. They don’t have as clear of an image but are the best option for traveling.