Celestron SkyMaster 25×100 Binoculars – Review

Binoculars for stargazing
Astronomy Binoculars

When you’re shopping for astronomy binoculars, size does matter, as larger models have the ability to let in more light and give you the clearest possible views of the night sky. Despite their vision enhancing benefits, though, larger binoculars are more cumbersome due to their bulkier design and increased weight. Compared to other large sized astronomy binoculars, however, the Celestron SkyMaster 25×100 Binoculars stand out because they provide the best viewing experience from a design that is easier to manage.

Heavyweight Binocuars

The Celestron SkyMaster 25×100 Binoculars weigh 156 ounces (9.75lbs), making them an impractical choice for hand-carrying or wearing around your neck, although they are still much less weighty than many of their competitors. Nevertheless, because of their size, the binoculars are best used along with a tripod built to hold-heavy duty binoculars, and for your convenience they come already equipped with a tripod adapter, as well as an easy-to-twist knob that adjusts its position to make mounting easy.

Sharp Focus

With 4-millimeter exit pupils and a 15-millimeter eye relief, the Celestron SkyMaster 25×100 Binoculars provide a full, comfortable view for most adults, including eyeglass wearers. The eyepieces feature 450-degree rotation, allowing you to get a focus that is incredibly sharp, while the 100-millimeter objective lenses make it possible to see very distant, faint objects in the night sky, leaving you feeling fully immersed in the night sky while stargazing.


The Celestron SkyMaster 25×100 Binoculars are water-resistant, and while they are missing the rubberized housing found on some competitors, lacking this extra insulation means that they are better able to adjust to outside temperatures, thus helps to extend the life of the binoculars. In lieu of the rubber coating, however, the binoculars feature a rubber ring around the housing that should be enough to keep out humidity and fog. In addition, the surface of the binoculars is textured to provide the slip-resistant traction that is usually made possible by a rubberized housing, and consequently you shouldn’t experience slippage when you’re setting up your tripod, or carrying the binoculars in your hand.

Some Drawbacks

There are a few drawbacks to the Celestron SkyMaster 25×100 Binoculars that should be pointed out. For one thing, the instruction manual is not very thorough, and beginners may find the documentation lacking to the point that it may make using the binoculars to their fullest difficult. Therefore, this model is recommended for those people who are upgrading from a smaller pair of astronomy binoculars.

There is also no center focus knob in the design, and while this isn’t an issue for astronomy users who will prefer to independently adjust the focus of the eyepieces, for terrestrial use this may prove to be a hassle. On the other hand, the size of these binoculars makes them less than ideal for many uses like hunting and boating, therefore the lack of a wheel is unlikely to really be much of a problem for most people.


Magnification: 25x porro prism binocular
Objective Diameter: 100 mm
Weight: 156 ounces
Field of View: 3 degrees
Exit Pupil: 4mm
Eye Relief: 15 mm
Optical Coating: Multi-Coated
Resistance: Waterproof

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