![]() ![]() The assembly of this Dobsonian telescope is straightforward, and it will take you around 30 minutes. The collimation with this cap is simple, and you can read my article on how to do the collimation of the telescope because I’m not going to explain it in depth here. You will also get a small collimation cap in the package, which is used to collimate the mirrors in the reflecting telescopes, so you don’t have to buy any additional collimation tools. You can increase the magnification of the eyepiece by using the 2x Barlow lens included in the package, which will double your magnification to 96x.īecause Orion SkyQuest XT8 has only one eyepiece in the box, I highly suggest upgrading the eyepiece collection with more eyepieces so you can squeeze as much as possible from this amazing instrument. The high magnification is necessary only with the Moon and planets. High magnification is not essential when you are looking for deep-sky objects like nebulas or star clusters. You have to divide the focal length of the telescope by the focal length of the eyepiece you want to use (in this case, 25mm). The Orion SkyQuest XT8 comes with Sirius Plossl 25mm eyepiece, giving you 48x magnification.Ĭalculating magnification is very easy. Many telescopes come only with 1.25″, which limits the telescope’s potential. So, if you want to upgrade something to 2″, there is no issue with that. The feature of using 2″ accessories is great even if the accessories that are in the box are 1.25″. It’s a standard focuser used in most telescopes. The standard size is 2,” but it has a nice 1.25″ adapter. The Orion SkyQuest XT8 is made with a 2″ Crayford focuser that accepts both 1.25″ and 2″ accessories. The focal length of 1200m will provide good magnification and a pleasant field of view if you use the correct eyepiece for different objects. It is easy to carry around, and it will fit in the trunk of any car. This focal length is decent and also provides good portability for the telescope. The focal length of the Orion SkyQuest XT8 is 1200mm. The focal length or the distance from the primary mirror to the focal point in the focuser is part of the telescope, which determines the magnification of the telescope when combined with the focal length of the eyepiece. Bigger apertures like 10″ will show you even more, but they are becoming too heavy to carry around, so if you plan to take your telescope on the trip under the dark sky, the 8″ is a perfect option. Still, it can collect much more light than the 5″ telescope. You can enjoy the night sky even with a 5″ telescope, so an 8″ is an excellent option because it is still not too big and heavy. ![]() The 8″ aperture is very reasonable because of its multiple points. Orion SkyQuest XT8 has an aperture of 8″, as we can already see in its name. The primary mirror of this telescope is a more advanced parabolic mirror compared to low-cost telescopes with only spherical primary mirrors. So, going for the biggest aperture you can afford is always a good idea. The bigger the mirror is, the more light the telescope collects, and you can see fainter objects. The primary mirror is the heart of every Newtonian telescope, and the size of this mirror will determine what you can see with a particular telescope. The primary mirror is the big mirror at the end of the optical tube. The aperture of the telescope is the diameter of the primary mirror. You may also like: Is A Cheap Telescope Worth It? Aperture The Dobsonian base is easy and cheap to manufacture, so you can spend the rest of the money on the bigger and better optical tube. This is why Dobsonian telescopes are much cheaper and have a bigger aperture than telescopes on different mounts like the German equatorial mount. The Dobsonian base is also famous and loved by astronomers because it can carry heavy loads. It has a simple design where the optical tube is literally sitting on the base that moves in altazimuth directions. I’m not aware of any refracting telescope mounted on the Dobsonian base. The name Dobsonian telescope comes from the base on which the Newtonian telescope is mounted.ĭobsonian telescopes are exclusively reflecting telescopes. ![]()
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