its a great deal for sure. this sucker is heavy though isn't it? Any idea how long it takes to set up? I would love something that doesn't take to long to set up and align. Also, if I set this up in my apartment will it go out of alignment everytime i walk it to my porch?
Don't get hung up on magnification. You can get any magnification you want on any telescope just by changing eye pieces, but that doesn't mean what you will see will be useful.
I guess which telescope would be best for you is based on what you are going to use it for.
Rrefractors are generally considered to be the instrument of choice for planetary viewing due to the pureness of the image path. The planets, the Moon, and close stars require high power, good contrast, and sharp resolution, and if is what you are looking for, a refractor is probably your best bet. They are also very good for distant terrestrial viewing.
Very faint objects like galaxies and nebulae need a huge aperture and therefore a reflector would be the telescope of choice.
Like I said before, both telescopes are very good deals and you won't go wrong with either.
The 90 EQ, as an achromatic refractor, will produce an abundance of false color around brighter astronomical objects. This will be most noticeable as a purple halo inhibiting crisp focus, although a filter known as a "minus-violet" can be used to reduce the effect.
The 130EQ, as a (newtonian) reflector produces clean non color-distorted images, and as mentioned earlier in this thread, has more light gathering power.
Either scope is equipped with an equatorial mount, which makes it easier to follow the "movement" of astronomical objects as they traverse the sky, but are quite quirky and clunky (ill-suited) for terrestrial viewing. Neither scope will disappoint at these prices, and will provide a decent gateway to the heavens
PS: Been doing this for quite a while... here are a few of my "babies".
I wonder if you can help... I am buying a first telescope for my son (12yrs old) and I am considering the Orion Skyquest XT4.5 or XT6.
I want to get him something that will give him a good feel for the hobby starting out... these are more expensive, but would they be good choices?
Thanks for any help you can offer!
The Orion XT6 is a superb scope, well-constructed and possesing fine optics. It is, in fact, part of the grand-prize we[asnh.org] have awarded for astronomy related Science Fair projects (city-wide, grades K-12) for the past few years. It uses what is known as a Dobsonian type mount (named for John Dobson, a prolific sidewalk astronomer[sidewalkastronomers.us] who helped popularize it), a type of alt-az mount. The XT6 is light enough to easily carry around, simple to set up and find targets, and provides some really cool views of many solar system and brighter deep sky objects. You'll easily see the moons of Jupiter, rings of Saturn, Martian ice cap, and numerous lunar features.
A great choice!
Oops! I forgot to add that while the 4.5 also is a very good scope, at 6" of aperture (XT6) many astro targets REALLY start getting interesting to view.
Last edited by pghyndman; 11-30-2012 at 10:55 AM..
after much thought i finally bought the Celestron AstroMaster 130EQ. I can't wait to get it!!!! Thanks for all the feedback in here. As the 90 is out of stock, i think i was leaning towards the 130 anyway and can't go wrong with my 1st scope. Any tips or great sites to learn more about my scope and hobby would be great! Thanks again and here's to clear skies!!!
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