DURABLE AND WATER-RESISTANT: A rubber-armored housing protects your binoculars from damage and provides a secure gripping surface. Both options can be time-consuming and significantly frustrating, and doing it yourself requires quite a degree of precision on account of the 25x magnification and the fact that these binoculars were never intended to be maintained by the user. To attach the binoculars to a tripod with a metal adapter, simply screw in your tripod head’s ¼ 20 screw to the adapter, remove the small Celestron-logo cover on the binoculars’ front end, screw the knob on the adapter into the binoculars, and you’re ready to attach the adapter to any tripod, monopod, or other mount with a ¼ 20 screw head.

I can imagine that the smaller exit pupil of the 25x70 would give more pleasant dark sky backgrounds than the 15x70s in your more light polluted area. Just select Zygo Test Report from the drop down box at the top of the listing and we will test the optics in house and provide a full 2 page report with your scope. Astronomy Binoculars with smartphone adapter and Tripod Adapter: Phone adapter with rubber sucker, which can 180°angle and length adjustment,is easy to set up and take images.The Celestron SkyMaster 25×70 binoculars excel in providing astronomy enthusiasts with an immersive and awe-inspiring experience. It means that as well as being pretty good binoculars for astronomy, they are perfect for a number of long range uses during the day.

Suitable for A Variety of Activities – High quality, high power binoculars for a variety of activities, including concerts, football, bird-watching, hunting and more, will bring more fun to your life. Again, these are measured by the interferometer when we take measurements of the optical surface after adjustment. There can be collimation issues in some samples too, although that can be improved using the small adjustment screws underneath the rubber armour. Rather than pull out all the telescope gear, these binoculars do a fantastic job for planets and stars.The binoculars also feature a central focusing wheel that allows for smooth and accurate adjustments, ensuring crisp and clear views of astronomical objects. Each pair of Celestron Skymaster Binoculars feature high quality BAK-4 prisms and multi-coated optics for enhanced contrast, clear, sharp views and ultra sharp focus across the field of view.

On the whole and compared to the binocular, the case is a little disappointing and even though it is a low cost binocular, the fact that these are larger and heavier than most regular bins, I would have liked to have seen a lot more padding on the case to protect them more. The top flap is held closed with a strip of Velcro which holds very well, but makes a huge noise when opening it, which to be fair is not such a great deal with these long distance binoculars as whatever you are about to look at will probably be a fair distance away and not be frightened off.

In good light, the image contrast looks good, but because the image was less bright than that of my controls, it looks as though the amount of contrast is less. However, as these binos where bought to scoop up fuzzies rather than planets I then turned my attention to some of them; as it was only just turning dark, I went first off for M13. Celestron do not specify the dimensions of their 25x70 SkyMaster on their specification chart, but I measured their length as 25. While the Celestron SkyMaster 25x70s are at least passable, their quality issues and cumbersome nature in both transport and use mean you really should consider alternative options with different aperture and magnification specifications, such as 15x70s, 12x70s, or smaller 50-60mm binoculars instead.