It just so happens that I just purchased a Celestron SkyMaster , Model#71009,15 x 70 binoculars. I recommend using a tripod mount with these. It does not take long for your arms to tire enough to cause shaking, or unstable viewing. But, these were worth every penny. They do allow a lot of light in. From the viewing I have done so far, I had no problem viewing the Orion Nebula, and some open clusters. The moon is rather bright. My viewing time has been limited due to weather. These do come with a tripod adapter and a nylon carry case. Even better if you buy these when they are on sale.