hívjon minket +36 1 9989202
vagy Kattintson ide ha inkább üzenetet szeretne küldeni


» » » Levenhuk Ra 250N Dob Telescope

Összehasonlítás

Levenhuk Ra 250N Dob Telescope

Levenhuk
Newtonian telescope. Primary mirror diameter: 254 mm. Focal length: 1255 mm.
  • Termékkód: 50749
  • Garancia: élettartamra szóló
  • Tömeg: 35,5 kg
  • Csomag méretei (HxSZxM): 145×50×50 cm
  Levenhuk Ra 250N Dob Telescope is a Newtonian telescope with an aperture of 254 mm (10 in) and a focal length of 1255 mm (49.4 in). Even if you are just thinking about getting into stargazing, this telescope is a perfect choice - it is extremely easy to assemble and control, thanks to the design of the Dobsonian mount. The Dobsonian mount is very e... további információk

Levenhuk Ra 250N Dob Telescope is a Newtonian telescope with an aperture of 254 mm (10 in) and a focal length of 1255 mm (49.4 in). Even if you are just thinking about getting into stargazing, this telescope is a perfect choice - it is extremely easy to assemble and control, thanks to the design of the Dobsonian mount. The Dobsonian mount is very easy to assemble - the kit already includes everything you will need to assemble it. The optical tube is placed into two slots on the assembled mount and is then locked in place with two springs. As soon as that is done, you can begin your observations.

The optical elements are made of BK-7 glass that yields sharp high-quality views. The optical tube has a built-in fan that cools the primary mirror and protects it from deformation, which further adds to the quality of the produced views.

Levenhuk Ra 250N comes with a dual-speed Crayford focuser that provides for precise focusing with no backlash. The focuser accepts 1.25" eyepieces (2" eyepieces will require an adapter), and its compression ring allows you to attach accessories in a matter of moments. The use of roller bearings in the azimuth slow-motion control provides for smooth and precise movements of the mount.

The large aperture of Levenhuk Ra 250N Dob Telescope - with the addition of the wide-FOV SuperView eyepiece (included in the kit) - allows you to observe star clusters, galaxies and other deep-sky objects. If you want to observe the Moon and Solar System planets, just switch from the SuperView eyepiece to 9-mm Plössl, and you will be able to see the tiniest details in lunar craters, and study the surface of Mars and even Saturn.

The Dobsonian mount is shipped unassembled.

Here you can find a list of celestial objects you can see with this telescope.

Main features:

  • Built-in cooling fan for the primary mirror;
  • Easy-to-use Dobsonian mount;
  • High-quality BK-7 glass optics;
  • Dual-speed Crayford focuser that ensures maximum precision during focus adjustments.

The kit includes:

  • Levenhuk Ra 250N Dob Telescope optical tube (optical elements inside)
  • Dobsonian mount
  • Plössl 9 mm eyepiece
  • SuperView 30 mm eyepiece
  • 8x50 finder scope
  • Finder scope base
  • Cooling fan
  • User guide and lifetime warranty

You can find a review on Levenhuk Ra 250N Dob Telescope here.


Find out the names of the most interesting celestial objects to observe here and here.

Optikai kialakítás

reflektor

Típus

Newton-féle

Optikai anyagok

BK-7 üveg

Elsődleges tükör átmérője (rekesznyílás), mm

254

Lencse (tükör) alakja

paraboloid

Fókusztávolság, mm

1255

Legkisebb gyakorlati nagyítás, x

36

Legnagyobb gyakorlati nagyítás, x

508

Nagyítás foka, x

508

Fókuszarány

f/5.1

Felbontási küszöbérték, ívmásodperc

0.5

Határmagnitúdó

14.7

Szemlencsék

Plössl 9 mm, SuperView 30 mm

Szemlencsetubus átmérője, mm

2

Keresőtávcső

optikai, 8x50 mm

Fókusz-állító

2'' dual-speed Crayford

Állványtípus

altazimuth, Dobsonian

Állvány súlya, kg

12.2
26.8

Tube-mount assembly system

quick-release thumbscrew

Optical tube material

fém

Optikai tubus átmérője, mm

310x1230
12.2x48.4

Optikai tubus súlya, kg

16.0
35.3

Rendeltetés

Általános használatra tervezett termék.
A terméket 3 évnél idősebb gyermekek már használhatják.

Tömeg, kg

35.5
78.3

Levenhuk Vélemények:

Here you can find a list of celestial objects you can see with this telescope.

Main features:

  • Built-in cooling fan for the primary mirror;
  • Easy-to-use Dobsonian mount;
  • High-quality BK-7 glass optics;
  • Dual-speed Crayford focuser that ensures maximum precision during focus adjustments.

The kit includes:

  • Levenhuk Ra 250N Dob Telescope optical tube (optical elements inside)
  • Dobsonian mount
  • Plössl 9 mm eyepiece
  • SuperView 30 mm eyepiece
  • 8x50 finder scope
  • Finder scope base
  • Cooling fan
  • User guide and lifetime warranty

You can find a review on Levenhuk Ra 250N Dob Telescope here.


Find out the names of the most interesting celestial objects to observe here and here.

There are no recent reviews available for this product.

Levenhuk Vélemények:

Here you can find a list of celestial objects you can see with this telescope.

Main features:

  • Built-in cooling fan for the primary mirror;
  • Easy-to-use Dobsonian mount;
  • High-quality BK-7 glass optics;
  • Dual-speed Crayford focuser that ensures maximum precision during focus adjustments.

The kit includes:

  • Levenhuk Ra 250N Dob Telescope optical tube (optical elements inside)
  • Dobsonian mount
  • Plössl 9 mm eyepiece
  • SuperView 30 mm eyepiece
  • 8x50 finder scope
  • Finder scope base
  • Cooling fan
  • User guide and lifetime warranty

You can find a review on Levenhuk Ra 250N Dob Telescope here.


Find out the names of the most interesting celestial objects to observe here and here.

Levenhuk Ra 250N Dob Telescope - Total: 24 Negatív 0 Pozitív 24


Ivan Ayers (2015-01-06 02:33): Pozitív
Does the difference in dimensions between Levenhuk Ra 300N Dob and Levenhuk Ra 250N Dob have any importance? Levenhuk Customer Service:
Levenhuk Ra 300N Dob Telescope features large objective lens diameter then Levenhuk Ra 250N Dob Telescope. Therefore, the maximum useful magnification of the first model will be higher.

Ivan Ayers (2014-12-10 09:29): Pozitív
Hello! Tell me please what is the objective lens diameter of this telescope? Is it 254mm or 250mm? Levenhuk Customer Service:
The objective lens diameter of the Levenhuk Ra 250N Dob telescope is 254mm.

Walter Carson (2014-09-10 06:58): Pozitív
Hello. Is it in stock? Levenhuk Customer Service:
Unfortunately this model is currently out of stock, we expect Levenhuk Ra 250N Dob to be back in stock in February, 2015. In the meantime please consider the Levenhuk Ra 300N Dob telescope: https://www.levenhuk.com/catalogue/telescopes/levenhuk-ra-300n-dob/

Bruce Hodge (2014-08-16 08:07): Pozitív
Hello, how is this model different than Levenhuk Ra 200N Dob (https://www.levenhuk.com/catalogue/telescopes/levenhuk-ra-200n-dob/)? Which one is better? Levenhuk Customer Service:
The main difference between Levenhuk Ra 250N Dob and Levenhuk Ra 200N Dob is primary mirror diameter (aperture). The Levenhuk Ra 250N Dob is a preferred choice due to larger primary mirror diameter.

Amy Larson (2014-08-08 02:44): Pozitív
Hello! I wanted to ask you which eyepiece would allow me to achieve the highest practical power of this telescope? Levenhuk Customer Service:
To achieve the highest practical power of the Levenhuk Ra 250N Dob telescope we recommend using 2.5 mm eyepiece. Unfortunately such accessory is unavailable in our store at the moment.

Gerry Bauman (2014-07-11 08:17): Pozitív
https://www.levenhuk.com/reviews/ra_250n_dob_telescope_review/ - it's one helpful detailed review! Levenhuk Customer Service:
Thank you for your feedback on Levenhuk Ra 250N Dob!

Gerry Bauman (2014-07-11 08:05): Pozitív
Despite the fact that I did not make telescope adjustment, I haven't notice any effect of coma. Well, we'll see, maybe I just got lucky. I started my observations with The Ring Nebula (M57) in the constellation of Lyra. I could clearly see a misty ring, with a noticeable dark hole in the middle. Then I found M13 - great globular cluster in Hercules. The star cluster was seen pretty well, individual stars could be seen throughout the area of the cluster up to the center. Yet I couldn't see The Veil Nebulae, I only saw the central star but not the nebulae itself... have to wait till August I guess. I didn't have much more time cause the skies started to light up... and I chose the wrong spot to observe - part of the sky on the south was blocked by a building. I observed with both standard eyepieces that come with this telescope. I especially liked the 2 inch eyepiece - wide angle of view allows observing vast star fields. Wide angle eyepieces are very useful tools indeed! I heard that with Levenhuk Ra 250N Dob you can discern colors of stars and some very bright nebulae. I'm not sure about nebulae (maybe it's true for Orion, I will definitely try it out) but I really can see difference in colors of some bright stars. In general, I'm really happy with my Levenhuk Ra 250N Dob. Even without adjustment and with such a bright sky image quality was still very good. The telescope's quite heavy... Thought I think I can handle even 300 mm ota, but it's not really convenient to carry such a monster around in the city. Plus it's more expensive. So I think I chose wisely. But when I read that with 300 mm you can see colors in deep-sky I feel a bit of jealousy, so maybe one day I'll go for it, but for now I'm quite happy with 250 mm. Levenhuk Customer Service:
Thank you for your feedback on Levenhuk Ra 250N Dob!

Ramon (2014-06-16 06:53): Pozitív
When will the telescope be in stock? Which similar models (not less than 250-300mm) would you recommend? Levenhuk Customer Service:
We expect it in September 2014. Please, take a look at Levenhuk Ra 300N Dob Telescope - https://www.levenhuk.com/catalogue/telescopes/levenhuk-ra-300n-dob/.

Warren Swanson (2014-06-11 09:14): Pozitív
Greetings! I bought this telescope, which eyepieces are better for planetary observations? Someone recommended me to buy wide-angle eyepieces... is it a good advice? Levenhuk Customer Service:
Yes, the use of wide-angle eyepieces is preferred.

Daniel (2014-06-09 05:28): Pozitív
I can see there is some kind of a cross inside the tube... will I see it when observing? Levenhuk Customer Service:
Don't worry, you won't see it, only high-quality image of observed object with no distortions.

Jeff Parker (2014-05-21 11:33): Pozitív
I apologize for this silly question, but why it is needed to cool the telescope mirror? Levenhuk Customer Service:
Cooling the telescope mirror significantly reduces time of optics thermal stabilization. Thanks to the built-in fan the primary mirror quickly reaches thermal equilibrium with the environment.

Tim Suarez (2014-04-11 07:13): Pozitív
Where can I fing user manual in english for this model? I haven't found it in the box. Levenhuk Customer Service:
You can download the user manual in the 'References and Downloads' section.

Randall (2014-02-26 06:55): Pozitív
Hi! What should I buy to use Canon EOS 600d camera with this telescope? Levenhuk Customer Service:
You need camera adapter. For instance Levenhuk 2x Barlow Lens with Camera Adapter: https://www.levenhuk.com/products/levenhuk-barlow-lens-2x-adapter/. T-ring for Canon cameras is also required.

Warren Mann (2014-02-13 11:01): Pozitív
what's the eyepiece to get the maximum magnification? Levenhuk Customer Service:
Please pay attention to Levenhuk Ra LER 3 mm Eyepiece: https://www.levenhuk.com/products/eyepiece-levenhuk-ra-ler-3/

Eric Chang (2014-02-02 12:48): Pozitív
Is it okay if I store this telescope in a larder where the temperature is the same as outdoors, what happens to the instrument in cold weather? Levenhuk Customer Service:
You can store Levenhuk Ra 250N Dob telescope in a larder, nothing bad will happen to it.

Yvonne Turner (2014-01-29 02:12): Pozitív
What are the telescope's dimensions? Levenhuk Customer Service:
The dimensions of the Levenhuk Ra 250N Dob telescope (LxWxH): 57.1?19.7?19.7 in.

Norman Merrill (2013-12-28 05:20): Pozitív
Hello! Tell me, please, which telescope is more suitable for observing the starry skies and terrestrial objects from the distance of 500 meters and more. It should have high focal ratio and of course wide field of view. The price range - 300-900$. and high-quality of course!!! Your help is really appreciated. Levenhuk Customer Service:
For your purposes refractors and catadioptric telescopes will suit greatly. Please consider this model: Levenhuk Strike 1000 PRO Telescope - https://www.levenhuk.com/products/telescope-levenhuk-strike-1000-pro/

Gary Palmer (2013-12-13 10:51): Pozitív
Hello! Which Barlow lens you would recommend me to buy additionally? How to achieve the maximum useful magnification? What objects can I observe at this magnification? Thank you. Levenhuk Customer Service:
To achieve the highest practical power we recommend you to use the eyepiece with 2.5 mm focal length. Barlow lenses in this case are not required. Here you can find a list of celestial objects you can see with a telescope based on its aperture - https://www.levenhuk.com/articles/things_you_can_see/

Dawn Sandoval (2013-11-14 05:45): Pozitív
Can I mount this telescope on Levenhuk Ra EQ5 GoTo? Or equip it with the auto guidance system somehow? Levenhuk Customer Service:
Levenhuk Ra 250N Dob telescope doesn't have fasteners required for it to be installed on Equatorial mounts. Currently we don't have motors for automatic guidance for dobsonian telescopes.

Irene Sherer (2013-09-03 01:21): Pozitív
Good evening! I don't understand anything in telescopes and astronomy, but I'm craving this telescope! I've been looking and comparing all day long and chose two models: this one and the Levenhuk SkyMatic 135 GTA. Which one would you recommend only for celestial observations (astrophotography is not needed), as I understand, with the first one I will be able to see more, but with the second - less, but without any problems. Levenhuk Customer Service:
The main advantage of Levenhuk Ra 250N Dob is larger objective lens diameter: the greater the aperture the more detailed images a telescope provides. On the other hand Levenhuk SkyMatic 135 GTA has an advanced auto guidance system, which with no doubt will be of a great help when navigating to and tracking celestial objects.

Paul Rouser (2013-07-16 02:12): Pozitív
Hello! I really like this telescope! Tell me, in theory, is it possible to see Jupiter's moons (Ganymede, Callisto) in detail? In astro forums I read that there's a possibility with this kind of telescope under good atmospheric conditions and in the countryside. Is it true? Levenhuk Customer Service:
Yes, it is true; under favorable weather conditions you can observe Jupiter’s Moons.

Joan Kenner (2013-06-10 06:19): Pozitív
Testing at the North Star under not calm atmospheric conditions allowed us to see the central disk and not less than 5 Airy's rings. The first observations. Saturn - under a relatively peaceful atmospheric conditions we observed Cassini gap and 3 satellites. Leo Triplet . Nebula Bode, Cigr galaxy, M106, Whirlpool galaxy (and both parts separately), Pinwheel Galaxy ( M101 to the extent possible), globular cluster M3 (and it was resolved into individual stars in 9mm plessl, very nice), M90. Scorpio: M4, M80, M19, Coma: M53, M64 (black eyes), Hercules: The M13 (Great Hercules Cluster ), M92, Chanterelles: M27 ( the Dumbbell Nebula ), Lyra: M57 (the Ring in Lyra ), Sagittarius: NGC 6530. Conclusions . The telescope requires calm atmospheric conditions with low turbulence. Good for deep-sky objects . Useful for planetary observations, but its main purpose - Deep-Sky Objects . Levenhuk Customer Service:
Thank you for your feedback!

Gina (2013-05-31 01:20): Pozitív
Tell me, what filters are suitable for deep space observing? or I can use the ones you mentioned before? Levenhuk Customer Service:
For deep-sky observations we recommend: https://www.levenhuk.com/products/filter-levenhuk-ra-uhc-1-25/ https://www.levenhuk.com/products/filter-levenhuk-ra-o-iii-1-25/ https://www.levenhuk.com/products/filter-levenhuk-ra-h-beta-1-25/

Gina (2013-05-30 09:50): Pozitív
Hello! Tell me, what accessories should I buy with this telescope for observing planets, as well as deep-sky objects (including The Sun) so I wouldn't have any problems and I could get maximum satisfaction right away? Levenhuk Customer Service:
Please, pay attention to the following eyepieces: https://www.levenhuk.com/products/eyepiece-levenhuk-ra-ler-3/ https://www.levenhuk.com/products/eyepiece-levenhuk-ra-er20-wa-12/. The set of filters: https://www.levenhuk.com/products/com-filters_f4_solar_system_set/
további információk

Küldje be a(z) termékkel kapcsolatos kérdését vagy véleményét Levenhuk Ra 250N Dob Telescope:

Kérjük, töltse ki a(z) "Név" mezőt.

Kérjük, töltse ki a(z) "E-mail cím" mezőt.

Kérjük, erősítse meg hozzájárulását a személyes adatok gyűjtéséhez és feldolgozásához.

 Hozzájárulok személyes adataim gyűjtéséhez és feldolgozásához.
Az űrlapon elküldött személyes adatokat kizárólag rendelése vagy kérelme feldolgozásához használjuk fel. Adatait a jogszabályoknak és a GDPR 2016/679 (az EU Általános Adatvédelmi Rendeletének) megfelelően, biztonságosan tároljuk.

Kérjük, töltse ki a(z) "Az Ön kérdése vagy megjegyzése" mezőt.