Celestron SkyMaster Giant 15×70 Binoculars with Tripod Adapter

Editor rating

4/5 on March 11, 2017

User's rating

2,961 reviews



  • Superior light transmission.
  • Easy montage.



  • It is not completely waterproof.
  • It is hard to focus if used without mounting it on a tripod.


The SkyMaster 15×70 giant binoculars is a lightweight, portable ground-based astronomy binoculars that provides quality optics, and whose versatile functions are complemented by a superb design to create a memorable stargazing experience.

Review of Celestron SkyMaster Giant 15×70 Binoculars with Tripod Adapter

The Celestron SkyMaster 15×70 is a giant binoculars made by Celestron. It belongs to the SkyMaster series of astronomy binoculars, and it uses state-of-the-art technology to provide unrivaled performance at an affordable cost. It is designed principally for astronomical viewing, but it can also be used for bird watching, wildlife observation, and outdoor sports. This review focuses on its features, price-quality assessment, and utility. To begin with, its pros (or merits) and cons (or demerits) are listed, and then used to pass a verdict. This helps highlight the utility of this product. This is then followed by a detailed review of Celestron SkyMaster Giant 15×70 Binoculars with Tripod Adapter.


  • Superior light transmission.
  • Easy montage.
  • Good price-quality ratio.
  • High magnification value.


  • It is not completely waterproof.
  • It is hard to focus if used without mounting it on a tripod.

An appropriate verdict for this product is stated hereafter. The SkyMaster 15×70 giant binoculars is a lightweight, portable ground-based astronomy binoculars that provides quality optics, and whose versatile functions are complemented by a superb design to create a memorable stargazing experience.

Technical specifications

Objective Lens Diameter (mm): 70 mm
Magnification (x): 15x
Angular Field of View: 4.4°
Linear Field of View: 231ft / 77m
Exit Pupil (mm): 4.7 mm
Eye Relief (mm): 18 mm
Close Focus: 43 ft (13 m)
IPD Max: 72 mm
IPD Min: 56 mm
Optical Coatings: Multi-Coated
Weight (oz): 48 oz (1361 g)
Prism Glass (Type): BaK-4
Twilight Factor: 2.40


Celestron Skymaster 15 x 70 binoculars reviewCelestron SkyMaster 15×70 binoculars is designed to be used by amateur astronomers, stargazers, and birdwatchers. Regardless, the alignment of its lenses and the optics it provides makes it suitable for observing the night sky. It measures 11x4x8.5 inches, and weighs about 3.28 pounds. However, its shipping weight is approximately 4.4 pounds due to the inclusion of the tripod adapter among other accessories.

This giant binoculars has an objective lens that measures 70mm in diameter, and the relatively large size of this lens has made this product to be categorized as a large aperture binoculars. It also has BAK-4 porro prisms. These BAK-4 prisms are among the best types of porro prisms as they are made from high quality optical glass, and consequently, the clarity of their images is superb. Moreover, these prisms provide exceptional light transmission, and this improves the edge-to-edge sharpness of the images, as well as reduces the degree to which the images are squared-off hence showing images that have a truer round.

It has a magnification capacity of 15×, and a 4.4-degree angular field of view. Even so, its apparent field of view is 66 degrees. It also features multi-coated optics which serve to optimize the contrast, as well as maximize the amount of light that can reach the objective lens. The large aperture allows maximum light to enter the binoculars, and this allows the viewer to use the binoculars in low-light conditions. Moreover, it makes this binoculars suitable for nighttime stargazing.

Its exit pupil diameter is 4.7mm, and the minimum inter-pupillary distance is 60mm. These together with the 4-element objective lens allows the binoculars to achieve an ultra-sharp focus across its field of view. This field of view is about 5 centimeters.

Its compact design reduces its size as well as improves its lightweight configuration. This also allows it to be fitted onto a tripod. In fact, each SkyMaster 15×70 binoculars comes with a tripod adapter which allows for easy montage. It also features protective rubber coverings, which are also designed to provide ultra-firm grip.

It also features a large focus dial, that is strategically placed at the center for easy access. Apart form easy focusing, it also offers 13 mm long eye relief, and this is allows short-sighted people and eyeglass wearers to use the binoculars without straining their eyes. Moreover, it features a Diopter adjustment which is well-placed for easy access and use for fine focusing.

The optics of the binoculars gives it a twilight factor of 32.4, and a relative brightness factor of 22.09, along with a close focus distance of 43 feet.

This astronomy binoculars is shipped alongside its carrying case, which is made of a soft material. This allows the user to safely store the binoculars, as well as travel around with it.

Whom does it suit?

The SkyMaster 15×70 binoculars is specially built for night-time sky-gazing. Likewise, its easy-to-use features allows it to be used by amateur sky-gazers, beginner astronomers, and birdwatchers. Also, the quality of its optics allows intermediate astronomers to use this binoculars to view the galaxies, stars, and moons of other planets in the solar system. In summary, its easy-to-use features and easy montage makes this giant astronomy binoculars ideal for use by almost any literate adult. Moreover, parents can allow curious children, especially those who are interested in sky-gazing and astronomy, to use this binoculars to satiate their curiosity.

How does it work

Zoom testThis large aperture binoculars consists of two telescopes that have been mounted side-by-side, and made to align and focus on the same direction. This allows the viewer to use both eyes to view the same distant object.

Each telescope consists of an eyepiece lens, two porro prisms, and an objective lens. Light from the object being viewed enters the objective lens and the light rays cast an image on the first prism. This image is then rotated 90-degrees and then passed to the second prism which also rotates the image by 90-degrees. Therefore, the image is rotated 180-degrees in total, and this means that the light rays that entered the objective lens are rotated 180-degrees before they reach the eye piece lens which then magnifies the rotated image so that the viewer can see the distant object.

The image rotation is necessitated by the fact that the objective lens inverts the light rays that pass through it, thus creating an image that is upside down. This rotation corrects this inversion and ensures that the image is viewed in the right orientation.

Price versus Benefits

The Celestron SkyMaster 15×70 giant binoculars retails for about USD70. When this price tag is compared to the versatility of this binoculars, along with its high-quality optic; then it evident that the product quality far surpasses the price value. Moreover, it offers unrivaled sky-gazing experience, and the fact that almost any adult can use it makes its benefits far outmatch the price tag. Therefore, this astronomy binoculars has an exceptionally good price-quality ratio.

Watch video:

Astrophotography sample photos

What customers say

This product has received favorable review from the customers. Most customers praise it for its light gathering capacity which allows it to produce clear images. Other customers praise it for its easy montage, while other value its superior optics.


Celestron offers a No Fault warranty for the SkyMaster giant 15×70 binoculars, and it lasts for the lifetime of the product. However, this warranty is valid only if the astronomy binoculars was purchased from an authorized trader.

Final recommendation

Celestron SkyMaster 15×70 astronomy binoculars is a versatile product that can be used for many purposes from sky-gazing to wildlife observation, and its high quality optics and easy-to-use feature renders it as a suitable product for amateur astronomers, birdwatchers, and sky-gazers. Anyone looking for a quality astronomy binoculars should consider purchasing the Celestron SkyMaster 15×70 giant binoculars.

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