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Celestron Skymaster 15 x 70 Observation Binoculars

Celestron Skymaster 15 x 70 Observation Binoculars
Price:  £129.00(Inc. 20% VAT)

Model:  71009
Brand:  Celestron
Magnification  15x
Objective Lens Size  70mm



Generally In Stock, Please Confirm Before Ordering

2 Year Warranty On All New Items
(Excluding Batteries & Globes)

  (4 Reviews)

Phenomenal performance for astronomical viewing

Celestron's SkyMaster Series of large aperture binoculars are a phenomenal value for high performance binoculars ideal for astronomical viewing or for terrestrial (land) use - especially over long distances. Each SkyMaster model features high quality BAK-4 prisms and multi-coated optics for enhanced contrast. Celestron has designed and engineered the larger SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions.

The 15x70 version is the most popular model in the series. It offers serious large aperture light gathering in an affordable and reasonably lightweight configuration.

General Details:

- 15x magnification porro prism binocular
- Large 70mm objective lens offers maximum image brightness in low-light and long-range conditions
- Four-element objective lens for ultra sharp focus across the field of view
- Multi-Coated optics for sharp, clear views
- Suitable for terrestrial or astronomical viewing
- Protective rubber covering for ultra-firm grip
- Large center focus know for easy focusing
- Tripod adapter included
- Long eye relief ideal for eyeglass wearers
- Carrying case included for travel and safe storage

Technical Information:

DIAMETER: 70 mm (2.76 in)
LINEAR FIELD OF VIEW (@1000 YDS): 230.41 ft (70.23 m)
EXIT PUPIL: 4.7 mm (0.19 in)
EYE RELIEF: 18 mm (0.71 in)
NEAR FOCUS (BINOCULARS): 43 ft (13.11 m)
WEATHER PROOF: Water Resistant
WEIGHT: 1360 g

Please note that stock levels do fluctuate so please call or email to check today's stock before placing your order.

Average Rating (4 Reviews):  
Write a Review and share your opinions!

Great viewing the night sky
21 September 2023  | 

First class service, great binoculars for the night sky, Rother valley staff are so honest in giving you advise on their items there is never any sales pitch with them, I always buy from them ordered 5pm and next day it arrived what a service don't go anywhere else really great service from the moment you make contact till your order arrives you updated on delivery all the time fantastic company 10 stars given if i could.

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Fantastic buy
25 March 2022  | 

I bought these Celestron Skymaster 15 x 70 as me and the wife go out on long walks, I did think they may be too powerfull for general wildlife but wow they are fantastic,went to David Attenboroughs nature reserve the wildlife was up close also spotting eagles in the sky you can see so much detail,what I did get is a thicker padded strap so could hang them around my neck we walked for around 5hrs no problem, theses binoculars are a fantastic buy great quality at a great price,the guys in the shop are so helpful and very knowledgeable already thinking on investing on the 25x70.

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Great grab and go's
15 April 2015  | 

I bought these to have a nosey at the night sky when it's partly cloudy or if I haven't got time or energy to get the full setup out. What a buy! Much better quality than I thought, very well built and feel of good quality. Decent size objective and not too much magnification gives these a nice field of view and allows the brighter object visible, even from light polluted areas. Includes a carry bag and a plastic tripod adaptor. The adaptor is extremely handy, you'll get much more enjoyment using these on tripod as they can start weighing your arms down after some time observing. Great for kids too, I set these up even when I have my bigger rigs out and let my kids scan the sky, some amazing views through them.

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7 of 7 people found this review helpful.

29 November 2013  | 

Having just got back into Astronomy I didn't want a massive initial financial outlay. These top the bill in terms of VFM and performance, the area I live is on the edge of a major town and I still found it easy to look at most sky objects. Andromeda galaxy was quickly located Pleaides look spectacular through these Binoculars...seriously if it's one pair of Binoculars you are looking for then look no this price you can't go wrong

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15 of 15 people found this review helpful.

Some items that are showing as in stock are in stock at our holding warehouses, not at the shop. To double check the stock levels at the shop, please contact us on 01909774369 or

The delivery times for most items is 1 - 2 days but again, please double check stock levels on important orders before placing an order via the website.

The delivery costs for courier next day are for mainland UK only. If you live in the Scottish Highlands/Islands, Channel Islands or Northern Ireland, then a shipping surchage will apply. please contact us for prices. Smaller items can still go 1st class via Royal Mail.

Please note that if you are wanting to take advantage of our Saturday and Sunday timed services or next day pre 12 or pre 10:30 services, you MUST check that the stock is here at the shop before placing orders. Also, orders using the Saturday and Sunday services must be placed before 1pm the previous working day. Also, please remember to check that the stock is here at the shop before placing orders. If the stock is not at the shop, we won't be able to ship on any of the timed services. 

Please note International customers will need to contact us for a shipping price prior to ordering via the website. We don't ship all items internationally. It is at our discretion what we ship outside of the UK. This all depends on the size and weight of the items. Please get in touch with us for any postage costs. Please note we do NOT ship telescopes or heavy items outside of the UK. This is due to massive postage costs and problems regarding returns.

If you have any questions regarding stock levels or delivery, please get in touch.

Zygo Interferometer Testing For ED Refractor Telescopes!

We are extremely pleased to announce our Zygo Interferometer is now installed and ready for use! Our experienced staff can test refractor lenses up to 120mm aperture and provide a comprehensive 2 page report showing the optical quality and Strehl ratio, plus much more information. We are using the very latest Zygo MX software to provide a more detailed report compared to other standard reports.


The interferometer is essentially a measuring instrument. Within the interferometer is a calibrated laser that is pointed through the optical test surface, then onto a high quality reference sphere, then back through the test subject then to an internal camera which gives us the measurement on the screen. From this, we can adjust the position of the test optic and the reference sphere to obtain a perfectly calibrated system. The more central the laser to the test optic and then on return, the better and more accurate reading and measurement we can take. This takes a lot of adjustment to get the best results from the optical surface. Once the measurement has been taken, we are provided with a series of results that show the optical quality of the surface plus other information. Continue reading for an explanation of the individual values and you can also see a test report that was done on one of our RVO Horizon 60 OTAs. 

We are offering certain telescopes with a Zygo test at an extra cost. Mainly ED doublets and triplets. All available telescopes with a Zygo test report are listed here. 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. This will show you the optical quality of your telescope optics. We can also offer this service on your refractor telescope. Please get in touch for more details about this. 

At Rother Valley Optics, one thing we pride ourselves on is customer service and quality of our equipment. When we test your telescope, we will ensure that it is of the highest quality otherwise, we will reject the scope under our strict quality control and test another model for your peace of mind. One of the main values to look at when testing a refractor is the Strehl ratio. The higher this number, the higher quality lens you have. At Rother Valley Optics, we will guarantee the highest possible Strehl ratio for your telescope.  We will aim to provide 0.95 Strehl or higher on Takahashi, RVO Horizon, William Optics and many more! Generally, the higher the Strehl ratio, the lower the Astigmatism and Coma meaning a better image quality from your instrument. 

Other measurements such as the PV and RMS are important too. With these measurements, the lower the number the better as it shows less curvature on the lens. The flatter an optical lens, the better it will perform. The PV rating (Peak To Valley) is a measurement from the highest point (Peak) to the lowest point (Valley). From this we get the RMS (Root, Mean, Square). This is a similar figure to the PV and measured exactly the same way. The RMS is basically an average height difference from the PV so again, the lower the better. As you can see form the example below, we measured an RMS of just 0.027 wave which is a very good value.

We also measure the Power with our systems which is essentially the error from the reference sphere to the test optic. The reference sphere we use on our system is a very high quality sphere so the closer to zero the Power, the less error between the 2 elements thus ensuring a higher quality optical surface. 

You will also see some more values such as Astigmatism and Coma. Again, these are measured by the interferometer when we take measurements of the optical surface after adjustment. These are values which ideally would be at 0 but as our test optics are all curved lenses, there will always be astigmatism and coma present. The lower the number, the less of these aberations you will effectively see but with most refractors, you can buy field flatteners which will compensate for the coma anyway. The astigmatisms value is explaining the error between the symmetrical curvature of the lens. Basically, no lens will be perfectly symmetrical, the lower the astigmatism, the more symmetrical the lens surface is. 

Once the Zygo test report has been completed, the optical alignment is thoroughly tested and tuned to ensure they are spot on before they leave us. 

All available telescopes are on the website at the link below and ones we've tested already that are available straight away are also listed.

Here is an example of the test what we provide. This was a test on one of our Horizon 60 ED OTA's.

For any questions about this amazing new service, please either call 01909774369 or email


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