- Nel caso in cui dovessero sorgere problemi con un prodotto delle categorie Elettronica ed Informatica oppure ritieni di avere bisogno di ulteriori informazioni tecniche, puoi trovare qui una lista di contatti dei centri assistenza delle principali marche a cui rivolgersi. Clicca qui per vedere la lista
Orion 08945e Reflector 29x Black - telescopes (118.1 cm, 20.3 cm, Metal, Wood)
|Prezzo:||EUR 345,99 Spedizione GRATUITA.|
|Tutti i prezzi includono l'IVA.|
- Clicca qui per verificare la compatibilità di questo prodotto con il tuo modello
- L'ottica del riflettore con diametro da 203 mm consente di guardare la luna e i pianeti in dettaglio da vicino e la luminosità è sufficiente per osservazioni piacevoli di nebulose vaghe, galassie e ammassi stellari
- Un telescopio Dobson perfetto che può durare una vita, destinato agli appassionati chi si avvicinano all'astronomia o all'intera famiglia
- La base Dobson estremamente stabile garantisce il perfetto equilibrio del tubo ottico del riflettore per una semplice visione mirata
- Include un focheggiatore Crayford da 51 mm che supporta oculari per telescopi da 32 e 51 mm, un oculare Sirius Plossl da 25 mm, un mirino reflex EZ Finder II, un tappo di collimazione, il software Starry Night e molto altro ancora.
Chi ha acquistato questo articolo ha acquistato anche
Quali altri articoli acquistano i clienti, dopo aver visualizzato questo articolo?
Offerte speciali e promozioni
Garanzia e recesso: Se vuoi restituire un prodotto entro 30 giorni dal ricevimento perché hai cambiato idea, consulta la nostra pagina d'aiuto sul Diritto di Recesso. Se hai ricevuto un prodotto difettoso o danneggiato consulta la nostra pagina d'aiuto sulla Garanzia Legale. Per informazioni specifiche sugli acquisti effettuati su Marketplace consulta… Maggiori informazioni la nostra pagina d'aiuto su Resi e rimborsi per articoli Marketplace.
A powerful telescope capable of providing night after night of stargazing enjoyment, the Orion SkyQuest XT8 Classic Dobsonian is one of our most popular models due to its elegant combination of precision optics, mechanical simplicity, and rock-solid stability. You and your whole family will appreciate the bright, clear views of the night sky provided by the XT8 Classic Dobsonian reflector. The Moon and planets of our solar system like Jupiter, Saturn, and Mars shine brightly in the SkyQuest XT8 Classic, allowing you to inspect them in detail. The XT8's 8" aperture is also large enough to gather a significant amount of light from more distant celestial objects for great views of sparkling star clusters, cloudy nebulas, and faraway galaxies. The XT8 Classic Dobsonian is a tremendous value considering the high quality views it provides on such a wide variety of celestial objects. The point-and-view simplicity of the Dobsonian design is not as complicated as a telescope attached to an equatorial (EQ) mount and tripod, so with a little practice, your whole family can scan the heavens just like experienced hobbyists. For any amateur astronomer seeking serious adventure, the XT8 Classic Dobsonian telescope has it all!
The SkyQuest XT8 Classic Dobsonian is built around an 8" (203mm) diameter parabolic primary mirror mounted in a cast-aluminum support cell. The mirror collects 78% more light than a 6" mirror, so you get a significant increase in ability to observe dust lanes in nebulas, resolve the cores of prominent globular star clusters, and to reveal some of the more subtle structures in faint galaxies. The 1200mm focal length (f/5.9) XT8 mirror allows you to obtain clear and crisp views at moderate to high magnifications on clear nights with good seeing conditions. Enhanced-reflectivity mirror coatings boost the XT8 Classic Dobsonian's mirror to 94% reflectivity so as much light as possible is transmitted to the eyepiece, for clear and bright views. The Dobsonian base of the XT8 Classic provides a simple and stable low-profile altazimuth platform for the 8" aperture reflector optical tube.
The Orion CorrecTension springs make setup easy and keep the telescope balanced
The tube attaches securely to the base by virtue of Orion's CorrecTension Friction Optimization system, which utilizes heavy-duty springs to both securely couple the tube to the base, and to keep the telescope in constant balance to avoid drifting during observations. Even with large 2" eyepieces and accessories installed, the XT8 Dobsonian telescope optical tube will remain balanced throughout your viewing sessions.
Dial-in celestial details with the smooth and accurate 2" Crayford focuser
The SkyQuest XT8 Classic Dobsonian features a 2" Crayford focuser with a removable 1.25" adapter so it can accept both 1.25" and 2" eyepieces and accessories. The Crayford mechanism ensures all focus adjustments are smooth, accurate, and virtually free of backlash and flexure, even with heavier 2" accessories installed, so you can achieve precise focus easily.
Explore the night sky with the included 25mm Sirius Plossl Eyepiece
The included 1.25" Orion 25mm Sirius Plossl eyepiece provides a 48-power view when used with the SkyQuest XT8 Classic Dobsonian telescope. Offering a wide 52° apparent field of view, the 25mm Sirius Plossl eyepiece yields extremely sharp images of impressively high contrast. You can expand your magnification options by purchasing additional 1.25" or larger 2" wide-angle eyepieces of different focal lengths. (Additional eyepieces sold separately.)
The included Orion EZ Finder II red-dot sight makes aiming the telescope nice and easy
Following a simple alignment procedure, you can use the EZ Finder II sight to accurately aim the SkyQuest XT8 Classic Dobsonian telescope at objects in the sky like the Moon and bright planets. Once aligned with the telescope, just turn on the EZ Finder II and peer through the sight's small circular viewing window so you see the red dot, and move the telescope until the red dot is on the object you want to see. Look in the telescope eyepiece, and the object will be there!
Learn about the night sky with the included Starry Night Special Edition software
Explore starry skies anytime - even when it's cloudy! The Orion AstroView 90mm Equatorial Refractor telescope includes a FREE Special Edition of Starry Night astronomy software. With realistic sky simulations and a many useful features including telescope control, the user-friendly Starry Night Special Edition software will help you plan your observations and understand what you see. Requires PC running Windows XP, Vista, 7 or 8. Requires Macintosh running OS X 10.4 or higher.
The popular Orion SkyQuest XT8 Classic Dobsonian also includes a quick collimation cap for easy mirror alignment, and dust caps for the reflector telescope tube and focuser.
The Orion XT8 Classic Dobsonian telescope can conveniently be separated into two pieces for easy transport and storage. By unhooking the two CorrecTension springs from the Dobsonian base you can detach the 46.5" long optical tube. The XT8 reflector optical tube weighs 20.3 lbs., while the 19" diameter Dobsonian base tips the scales at 20.7 lbs. With an assembled weight of 41 lbs., the XT8 Classic Dobsonian can be easily moved to and from your favorite observing site, whether it's just a few steps out the back door, or many miles down the road.
A great telescope with the optical strength to please serious beginners and veteran skygazers alike, the Orion SkyQuest XT8 Classic Dobsonian reflector will provide years of astronomical adventure for you and your whole family.
Meets or exceeds all California State Environmental Quality & Safety Regulations (CARB 93120 Phase 2 Compliant).
- A large aperture Classic Dobsonian reflector telescope at a very affordable price!
- 8" diameter reflector optics lets you view the Moon and planets in close up detail, and has enough light grasp to pull in pleasing views of faint nebulas, galaxies and star clusters;
- A perfect Dobsonian telescope that can last a lifetime for the beginning astronomy enthusiast or whole family;
- The ultra-stable Dobsonian base keeps the reflector optical tube perfectly balanced for point-and-view ease of use;
- Includes a 2" Crayford focuser that accepts 1.25" and 2" telescope eyepieces, a 25mm Sirius Plossl eyepiece, an EZ Finder II reflex sight, collimation cap, Starry Night software download, and more!
Colour of product: Black
Fixed aperture: 20.3 cm
Fixed focal length: 120 cm
Focal ratio: 5.9
Length: 118.1 cm
Tube type: Metal
Principali recensioni dei clienti
Ottica plossl 25mm in dotazione ottima, così come l'esperienza visiva in generale. A Padova il cielo è pessimo per le osservazioni, ma ho comunque apprezzato gli anelli di Saturno anche in una notte estiva con il cielo velato e inquinamento luminoso al massimo. Non vedo l'ora di testarlo in montagna.
Unica nota negativa il vettore: il pacco che conteneva il tubo era ammaccato in piu' punti ma, per fortuna, nessun danno al contenuto. Da migliorare!!
Ottima la fattura del prodotto, ottima soddisfazione nell'osservazione del cielo profondo e dei pianeti.
100% contento dell'acquisto.
Le recensioni clienti più utili su Amazon.com
The good: decent size optics that have a lot of light gathering ability. This is needed for the faint galaxies, nebula, and star clusters. Scope also has decent accessories. While the focuser isn't top quality, it functions pretty well. Didn't notice much slop. Primary mirror cell is nice with springs on the collimation screws, and with locking screws. Secondary also has three screws for collimation. Most seem to come with the EZ Finder reflex sight with is good. Mine came with the 9x50 right angler finder, like the guy in the last photo has. Not top quality, but decent. Can easily see star clusters, and the moons of Jupiter through the finder. However, I prefer a straight through finder because it's easier and more intuitive to point. I'm going to add a reflex sight which will then give me the best of both worlds. The reflex finder will get me to the area, then the right angle optical finder will let me zero in easily. The springs on the Dobsonian mount are a nice touch. It keeps the scope from slowly drifting up or down because of balance issues. Makes adding accessories easier without having to worry about making the scope top heavy. Overall construction of base seems decent. Included eyepiece is of decent, beginner quality. The carrying handle on the base is a nice touch, though a couple on the sides would be more functional. I've used cutouts as handles on Dobsonians I've made myself. The scope doesn't weight too much so it's easy to move around, take outside, etc.
The bad: the bearings for the base are pretty bad. Both the altitude and azimuth are just thin nylon pads. The altitude functions okay, but would have been better if they were Teflon. The azimuth bearings are horrible. It's just thin nylon pads against the bare base. It feels like it is scrubbing. They should have been Teflon, and there should have been some Formica or some other surface on the bottom of the base for then to glide on. For example, Teflon pads on Ebony Star Formica would give a buttery smooth motion, which is what you expect in a Dobsonian. With the Orion XT8, you get a sticky, scrubbing motion. It works okay, but it could have been a lot better. The collimation cap is joke. Although it does center your eye, it's pretty much useless after that. It should have been a mirror inside, but instead it's just some stick-on, silver colored plastic. I suggest people invest in a nice laser collimator.
The ugly: unfortunately, the "ugly" is a fatal flaw. While I can upgrade, correct, and enhance the other issues, this flaw is beyond my abilities. The heart of the telescope, the 8" primary mirror, is not figured correctly. Basically, the primary of a Newtonian reflecting telescope should be shaped like a parabola. Any deviation from the parabola will cause problems in the final images. For example, one common flaw is called a turned down edge. Basically the outer portion of the mirror is flatter than the rest instead of following the curve of the parabola. What happens is that you get images that are soft, or blurry. You can't get images to snap into pinpoint focus. Stars will be little blobs instead of pinpoints. You can test your optics by pointing to a relatively bright star, with a moderate to high power eyepiece. Slightly defocus the star (by moving the focuser out) and you will see it turn into an image that looks like a bull's eye. These rings are the diffraction pattern. If you defocus in the other direction (by moving the focuser in), you'll see the same thing on the other side of the focus point. These two diffraction patterns, on the inside and outside of focus, should match. This is called the "star test". If they are different, you have problems with the figure of the mirror (i.e. the manufacturer didn't get it quite right, and strayed from the parabola). A little error is okay, and even expected in commercial optics. But if the error is too great, you can never get a good, sharp focus. And that's the problem with my Orion XT8. My images are fuzzy, and blurry, never snapping into sharp focus. From the star test of my scope, I either have a turned down edge, or some other spherical aberration, or a combination. I haven't studied the pattern enough to determine it yet. But it is a fatal flaw that I can't correct myself, which severely affects the performance of the telescope.
The average beginner probably wouldn't notice right away, which is probably why you see so many five star reviews. They see craters on the moon and say, "Wow!" With good optics, they should also be able to see individual mountain peaks. They see the two main of cloud belts on Jupiter, and the Jovian moons, and are happy. They should be able to see multiple belts, and festoons and swirls, detail in the red spot, the shadow of the moons as they travel in front of Jupiter. They see Saturn's rings and are elated. But they should also be able to see divisions within the rings, such as the Cassini division. The bottom line is they are mostly limited to low power views, with mediocre images. Higher powers will not give the sharp focus they should. An 8" f/6 mirror should deliver the universe, but the Orion 8XT falls short. The average person that never takes more than a causal glance at the moon or deep sky stuff will probably rate the scope a three to four star purchase. But for the ones that really want to get serious about astronomy, or happen to observe through a quality instrument, will quickly realize that the heart of this telescope, the primary mirror, is fatally flawed.
With regards to customer service, I've read enough complaints on various other sites, many dedicated to astronomy, to realize that Orion's customer service has really fallen. It's now a profit-priority-through-volume company. I literally had a service rep once respond to my complaint about an equatorial mount as, "What do you expect? It's made in China!"
The Orion XT8 telescope could easily be a five star scope with a little more effort toward quality. A primary mirror with an extremely poor figure is unacceptable quality, and a fatal flaw to a system that depends on that mirror to function properly.
I decided to revise my review and raise the rating to 3 stars. The reason is two-fold. First, after letting the telescope cool down significantly with regards to the ambient temperature, I was able to get better images out of it. A better quality mirror would have been able to produce better images without having to cool so much, but I was still able to coax decent images from this one after putting in more effort and time. Secondly, I realized that everything is relative. Compared to other scopes within this price range, it's not that far out of line with the performance of others. In other words, it's average, thus the 3 stars.
The entire scope was very easy to assemble. A complete set of tools for assembly - including a wrench stamped from sheet metal, a number of Allen (hex) wrenches, and a Philips head screwdriver - were included. I have better quality tools, but I appreciated the thought on Orion's part. Nothing could be more infuriating than trying to assemble a telescope only to find, at some critical step, that you're missing a 4mm Allen wrench.
Base assembly was the most time-consuming part of setup, and took me about twenty minutes on my own. The scope arrived needing only a tiny bit of adjustment. The included collimation cap made it easy. Adjusting the viewfinder's accuracy was more fiddly, since the finder and the mount it is on are made from plastic that flexes at anything more than the lightest touch. A metal mount and perhaps a better mounting system would have made adjusting it easier.
A single eyepiece is included. I viewed the Orion Nebula through it last night and even in light-polluted Sherman Oaks the nebula stood out clearly from the grey sky behind like a dark blue-green orchid with bright blue and white young stars scattered throughout. This eyepiece should make viewing large, bright deep sky objects visible to the naked eye, like the Pleiades or the Andromeda Galaxy, a real treat for the viewer. While not ideal for looking at planets, I was able to clearly discern two distinct bands across the (small) face of Jupiter, and could pick out the Galilean moons without a problem.
My girlfriend and I are easily able to carry the halves of the scope - the base and the tube - around with us. I can also pick it up by its handle using the method recommended in the assembly manual, but it's quite heavy and awkward. I prefer to transport it with the pieces separated unless moving only a short distance.
I would purchase this scope again in the same circumstances, and I look forward to a year of viewing both at home and on the road under darker skies.
This thing is massive, its heavier and taller than my 8 y/o. We would have to look into lugging this thing in a dolly. We plan on bringing this when we go camping. We live in the white zone of NYC/Newark area, but this sucker can collect enough light/stars and NOT be massive enough to break my back and bank. Very happy with it ;)