Jumbo binoculars offer an oversized lens diameter. Thanks to their large lens the maximum amount of light is collected and therefore the image is bright. They are perfect for anyone who wants to observe the sky, comets or star fields, even in the dark. Theys can reach powerful magnifications, similar to a zoom. It is imperative to put your Jumbo binoculars on a tripod as they are heavy and holding it at arm's length for long observations is almost impossible.