Bresser Pluto II 114/500 EQ Reflector Telescope

For your easy start in astronomy the very fast entry-level telescope with lots of accessories is easily transportable and ideal for wide-field observations

Complete set of telescope, tripod, mount and comprehensive accessories
Easy-to-use reflector telescope for beginners
Telescope aperture: 114 mm / focal length: 500 mm
Ideal for wide field observations and ''walks'' in the Milky Way
Easy to transport
Astrophotos with smartphone possible
Plenty of accessories to get started immediately
With secure aperture solar filter
The BRESSER Pluto telescope is the perfect combination of a large Newtonian mirror with a short focal length
Divided into optical tube and mount, this telescopes fits also into smaller cars. The ideal traveller's scope with high imaging quality

Who doesn't dream of exploring the vastness of the universe with their own eyes? This complete telescope set comes with everything you need for your journey to open star clusters and distant emission nebulae: an astronomical reflecting telescope with 114 mm aperture and 500 mm focal length, an equatorial mount, a tripod and extensive accessories for astronomical observations. You can immediately start your very own adventure in astronomy, because the system is very easy to handle and transport. Especially wide-field observations in the Milky Way are a joy to watch through the beginner's telescope.

A classic for a start - the telescope
With the classic reflector telescope, a so-called Newtonian reflector, you’ll achieve a successful start in sky observation. A special feature of this type of telescope is that you don’t look in at the back of the telescope, but at the side in the front. The advantage is the comfortable observation position. So you don't have to bend down when the entry-level telescope is pointed vertically into the sky. In terms of optics, these reflecting telescopes are impressive in that they are absolutely free of chromatic aberrations and offer good imaging properties.

With its 114 mm aperture, the entry-level telescope already collects a lot of light from celestial objects. In addition, 114 mm aperture and 500 mm focal length result in a very short focal ratio (ratio of the aperture to the focal length) of about 1 to 4.4 (F/4.4). This causes the telescope to be very fast and to deliver an extremely bright image. The fast focal ratio and the short focal length cause the telescope to be a specialist for observing structures in the Milky Way and extended gas nebulae, for example the North America Nebula NGC 7000. This way a ''walk'' through the Milky Way with low magnification is simply a lot of fun. And you can choose the perfect place for it, because the entry-level telescope is very compact and therefore easily transported.

And how closely will you be able to look? The aperture of 114 mm offers a resolving power that allows magnifications of up to about 230x with sharp images. Technically, even higher magnifications are possible - theoretically up to 375x by using the included accessories. However, as the magnification increases, the sharpness of the image may slowly decrease. Of course, it is not only your telescope that determines how much you can magnify. The air turbulence in the atmosphere (seeing conditions) is also an important factor.

Note for nature lovers:
If you choose a Newtonian telescope like the Pluto reflector telescope, you can look forward to a specialist in astronomical observation. However, the image is always displayed sideways as well as upside down, which makes no difference when observing the sky. However, this type of telescope is less suitable for nature and landscape observations during the day. Would you also like to use your new telescope for exciting nature discoveries? Then we recommend that you choose one of the BRESSER refractor telescopes.

The perfect foundation for your astro-start - mount and tripod
Have you found the ideal location for your celestial observations? Then simply attach the telescope tube to the height-adjustable tripod with equatorial mount. It makes tracking particularly easy, because in contrast to an azimuthal mount, you do not need to move both axes at the same time. So you simply align one axis parallel to the Earth's axis by pointing it approximately at Polaris. This process is called ''alignment''. After that, you track your celestial bodies only on this one axis. Another plus of the mount are the two flexible shafts with fine adjustment. They make adjusting and tracking the beginner's telescope particularly precise and comfortable. Very handy: A storage plate mounted between the tripod legs allows easy access to your accessories.

Keep track of things automatically: For this telescope’s equatorial EQ-3 mount, the tracking motor with item number 4951400 is available as an optional accessory. This eliminates the need to manually track a celestial object set in the telescope. When this motor is installed at the mount, it automatically tracks the celestial object, keeping it in the field of view of the eyepiece. This makes observing the night sky even more comfortable!

Everything included - the accessories
Unpack, set up and start your journey of discovery across the night sky right away – for this purpose the astronomy set comes with all the necessary accessories. Get the perfect overview with the LED viewfinder. To do this, the viewfinder is simply installed parallel to the actual telescope. Turned on, it projects a red dot onto a small ground-glass screen. Look through it and it appears to hover in front of the night sky in exactly the direction in which you have aligned your entry-level telescope. Thus precise telescope alignment and finding celestial objects becomes child's play when you are using the LED viewfinder.

A larger field of view or more details? With the two eyepieces (4 mm and 20 mm) you can admire the objects in different magnifications. The 3x Barlow lens goes one better: it allows you to triple the magnification of the eyepieces.
But it doesn't have to stop there: If you ever want to expand your astronomy set, you can choose from a variety of additionally available eyepieces. After all, the socket diameter of 31.7 mm (1.25 inch) follows an international and manufacturer-independent standard.

Observe the star of our daytime sky completely safely – to this end a solar filter is included with the entry-level telescope. Take a closer look at the sunspots and marvel at the granulation on our very own star.
CAUTION: Never point the telescope at the Sun without the solar filter!

For quick snapshots of special discoveries, grab the smartphone camera adapter. This way you can delight yourself and your friends again and again with fascinating astrophotos, for example of the Moon or the Sun.

FEATURES
Reflector telescope for beginners with 114 mm aperture and 500 mm focal length
Reflector type Newton
Ideal for observing the Milky Way and extended gas nebulae at low magnifications
Height-adjustable tripod with equatorial EQ3 mount
Easy to use, very good for beginners
Focal ratio F/4.4, therefore very fast and bright image
Very compact, easy to transport
31.7 mm eyepiece extension (1.25 inch)
Two eyepieces and one Barlow lens with 31.7 mm (1.25 inch) focusers for different magnifications
Safe solar observation with the included solar filter
Entry into astrophotography with smartphone camera adapter

SCOPE OF DELIVERY
Telescope
Aluminium tripod
Equatorial EQ3 mount
Eyepieces: 4 mm and 20 mm (1.25-inch socket)
Barlow lens 3x (1.25-inch socket)
LED illuminated dot finder
Solar filter
Smartphone camera adapter
Accessory tray
Astronomy software download
Instruction manual

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 sales@rothervalleyoptics.co.uk.

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.

https://www.rothervalleyoptics.co.uk/zygo-tested-refractors.html

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 sales@rothervalleyoptics.co.uk.

Are you interested in this product but would like to speak to someone with some more information? Simply fill in the form below and we will get back to you as soon as we can!

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