NexStar 90SLT

As a former professional astronomer and user of other amateur telescopes I bought this to try and introduce my children to observing and am mainly comparing this to a 6 inch Newtonian reflector with an equatorial mount which has served me well in the past, but is very large and heavy to set up, so an easier alternative was called for. The first night I used this I was hampered by cloud, so could only do a basic setup and some initial lunar observing, but I was pleased to find that this was easy to set up in a short period of time, using the quick setup guide. The lunar views I got were excellent and my kids (and even my wife!) were enthralled with the first views of the moon that we obtained. The second night, although cloud was again an issue, I managed to set the scope up fully. the set up was easy, following the instructions, although it is sometimes tricky to remember that the arrow buttons are only used for controlling the movements of the scope from the handset and not navigating the menus, however they were largely self-explanatory and made the initial setup easy. I would advise using a custom site for alignment using a smartphone with GPS (almost ubiquitous these days) to obtain the precise location, just remember you will need the location in degrees, minute and seconds of arc, rather than decimal. This is quite easy to find with a quick internet search on a smartphone however. Exact times from a reliable source, such as a synced smartphone is also required, along with your time zone. Once these are in you can choose to align the scope using any three bright stars or other celestial objects (moon or planets), simply align the object in the finder scope, then centralise in the eyepiece and align using the handset. This was done in minimal time, even with poor visibility due to cloud and the computer accurately aligned the scope at the first attempt with no need for firmware updates or similar for the handset. Following alignment I used the sky tour to find appropriate objects and after checking that the sky model was correct (it was able to find the moon without difficulty in the solar system mode) I used the handset to move to Andromeda, which was visible as a fuzzy patch, despite poor visibility and quite bad light pollution. The tracking seems to work fairly well and will keep an object in view for a significant amount of time (quite sufficient for real-time observing using the eyepiece), but did exhibit some element of drift, so would not be suitable for deep sky astrophotography, but this is to be expected with an alt-azimuth mount, as compared to an equatorial setup. Unfortunately, the sky conditions deteriorated further preventing any more testing on other objects, but overall this telescope is easy to set up and provides a quick means of finding astronomical objects. As a starter scope at a reasonable price it would seem that it is difficult to beat. In terms of power, I did buy the external battery pack which allows extended observing and this seems to be the best way to power the scope as while using the internal 8xAA batteries would avoid any problems with cord entanglement, the lack of battery life may limit it without a substantial supply. Cord length and wrapping would be even more of an issue with a mains powered supply and could be problematic for anything more than a small distance outside. The scope does need power to operate though and cannot really be operated without it, which is definitely a downside if you were wanting the use it in an unpowered alt-azimuth mode. Overall, this seems to provide a good observing experience for the aperture and price and is highly recommended for a beginner. Obviously, you could get a larger aperture without the goto function for the same price, but this really wins on convenience. I look forward to may happy nights observing with my kids in the near future.

I'm not professional, these are just my impressions. WARNING 1: this might be a begining of an expensive hobby! You will likely want accessories, filters, eyepieces, and maybe larger aperture for deep sky. Search for what you can see with a telescope (especially if you're interested in Nebulae/galaxies) if it's you first one to manage expectations. WARNING 2: you won't see details and colours you see in pictures online including mine (except maybe for Moon). Cameras are far more sensitive and have longer exposures than our eyes. Search Orion Nebula or M81 through a 5, 8, 10 inch telescope for example to have an idea and compare with pictures. Overall, I'm very happy with the telescope, optics seem quite good without noticeable chromatic aberrations, tracking is OK with options to fine-tune during use. After using this, I'm curious to try something with a larger aperture to see more details in deep sky, but it doesn't mean I'm enjoying this telescope any less. For me it hits a good balance of power, ease of use, and portability. Though 8-inch aperture ones would probably last you much longer if you're going to get into the hobby more seriously, those are much more expensive and heavy. You are paying a premium for goto functionality and compact design compared to some other 5-inch options, but I found goto to be very helpful especially at first. This vs a Dobsonian: Observing with a tripod is so much easier especially when what you're looking at is low. Optical tube is much more compact compared to Dob of comparable aperture and f-ratio, but later would probably be cheaper. As far as I can tell, a typical Newtonian reflector would be far less tolerant to collimation issues than this design. Learning with this is certainly easier. If it's your first telescope - be prepared you won't see the colours and details you see in pictures online. Those are captured with cameras with longer exposures and higher sensitivity than human eyes and are heavily processed. This being said, I got this picture of Orion Nebula with an old unmodified DSLR through this telescope in a single exposure, no stacking or additional hardware. What can you see? Moon - amazing! Very bright, very sharp clear small details, no weird colours. Planets - they appear about small pea-sized, rings of Saturn are clearly visible, as well as bands of Jupiter (in colour). You can get them bigger with additional eyepieces or Barlow lenses, but with ones I got (admittedly not the highest quality) I couldn't see more details - same thing just bigger and a little blurrier. Deep sky objects - probably the coolest thing to photograph, but visually seeing it for the first time it's amazing how dim those are in general. I could see Orion Nebula and some other DSOs. In Orion Nebula I could see general shape, but no colour when observing from Peak District. You can probably see more from a darker site, but I haven't tested it. Overall the aperture is considered small for visual DSO observation, but I could see something. Moon, snow, atmospheric conditions (e.g. turbulent air) will all affect your observation. Relative positions of earth to other planet also affects the details you see. Mount, focuser etc: I've read complaints about the mount not being sturdy enough online. It's definitely more shaky than a heavy Dobsonian, but for me it's perfectly useable. You do need to wait a couple seconds after adjusting focus for it to get stable, but you absolutely can get clear view and pictures after that. GoTo depends on how good your alignment is and has couple clever features - there is a "precision goto" option in the menu where it first navigates to nearby easy to see object for you to correct error and then it goes to actual target. Mount doesn't fold flat with optical tube as SE model does. The tripod is a bit bigger than a typical photo tripod when folded. If you're thinking of getting this and using mount for later optical tube upgrades, search for mount limits - you probably won't put much more onto it. I've read online people ignoring limits and putting 6se and even 8se on it, but it will be even shakier and I have no idea how long it will last if you did it and I doubt warranty will cover it. You need to align red dot finder and the telescope before observation, otherwise finding anything is very difficult. The mount is Alt-Az, as opposed to equatorial if it makes difference for you.

This telescope is my first, and a great way to get into astronomy, have had it a couple of months now. And it is so much fun, it was so simple to get going, I had it up and running in ten mins on my first go!!,the planets and moon through this are great, Jupiter is my fave, looks like a white pea with a couple of reddish lines going through it, and 4to7little dots next to it(moons), don't sound great but remember this is a small low priced telescope(great value for the money),you are not gonna see loads with this. But, it will teach you so much about the night sky,and it's really portable, i carry it in a big bag, and it takes only ten minutes to get it out and running, the goto is not 100percent accurate, but it points you in the right direction, and your own brain works out the rest( makes you feel useful), the eye pieces you get are quite good, get a Barlow and it's all you need, I bought some really expensive ones, but on the intention of a much bigger scope in a year or 2, they don't make a great deal of difference with this low powered scope, it really is a great learning tool tho, and I'll never get rid of it, as it will great for my 2 year old in a few years time .And highly recommend it as a beginners only telescope

المنتج رائع ومثالي للفئه الهاوية للتبع الكواكب النجوم مع اخذ الاعتبار بامتلاك عدسات مناسبه اضافيه

Ay izlenimi çok iyi kusursuz gösterim yıldız haritanı varsa neredeyse tüm yıldızları görebiliorsunuz jupiter ve uydularını net görebilirsiniz zoom yapmanız gerekiyor beğendim efso bişi

Last week I received my NexStar 130 SLT. I made the decision to buy this scope based almost entirely on the recommendations of reviewers both here on Amazon and elsewhere. This is my first telescope, and I will say will say up front that I am completely happy with this scope! Regarding the negative reviews, I can sympathize that in some cases a truly defective article can arrive. For many, I would suspect that the issues encountered were largely of their own making. While in the main, this scope is relatively simple to set up and use, it still helps to have at least a modicum of technical skill (a healthy dose of common sense will help too!). The evening I received the scope (15 July) I set it up on my deck. Yes, not the most stable of platform, but I live in a dense neighborhood with lots of obstructions and murderous light pollution. The star alignment, using the 3-star "Star Align" process, took me two attempts. I blame my ineptitude with the use of an eyepiece and not having stars truly centered in the field of view for this. Regarding this, I think an eyepiece with a crosshair would be excellent for performing these alignments. (Another night I had multiple failures. This turned out to be related to the incorrect time, which was off by a few hours. The system will apparently remember the last values you entered. Be advised, they will not update and will be incorrect. Check your time and date each time you power up the system! (Many complain that the system does not retain the time once it is entered. I would venture a guess here as to why. The simple truth is that it would drift off of "real" time within a very short matter of time. Maybe adding the optional GPS module would fix this problem, but the internal NexStar clock is simply freewheeling and will inevitably be off the longer it ran on its own. Having to re-enter it each time you power up ensures that time is not an issue during the alignment procedure. Imagine your frustration if you took tons of time aligning each star in your eyepiece, and despite your best efforts the system would not align? Re-entering the time alleviates this factor, assuming you enter it correctly!) For my location, I simply plotted my deck in Google Earth and wrote down the coordinates. This seems to have enough fidelity for the star alignment to work. Once I had the telescope aligned I picked a random bright object in the southern sky to examine. Imagine my surprise when the first celestial body I have ever viewed through a telescope turned out to be Saturn! Using the provided 9mm eyepiece, the rings were clearly visible. I had not yet received my collimation eyepiece, so I was worried that it might need an adjustment. No adjustment necessary on my scope at this time! I am looking forward to viewing through higher-quality optics though. Regarding the stability issues that many have commented about. Yes, images do move about quite easily, especially on my wooden deck. I have not yet weighted the tripod or gotten a set of the damping pads. I will say that image stabilization is not completely unbearable on my scope. In just a couple of seconds after making a focusing or alignment adjustment, images became still enough to view nicely. I can only imagine this will improve with weights and dampers. I do see why this scope would not be ideal for astrophotograpy though. I would think it would not be impossible, but you would have to ensure the scope is deployed on a solid foundation and go to great lengths not to disturb the scope in any way. I was able to configure and control my scope with Celestron's enclosed NexStar Observer List (NSOL) software and the freeware Stellarium packages relatively painlessly. Install the drivers that come with your USB-to-Serial Port adapter. (The computer interface to the NexStar handset requires a serial RJ-11 phone jack. Celestron sells a cable with an RJ-11 phone connector on one end and computer 9-pin RS-232 serial port connector on the other. Most likely your computer/laptop will not have a serial port, so you will have to further adapt this to USB) My laptop configured the COM3 serial port, but your mileage may vary depending on your system. Make sure to restart your computer once the drivers are installed. Truth in advertising, I tested my scope indoors using an arbitrary alignment. The scope tracked and moved what seemed to be the proper azimuths and elevations for the objects I selected in the software. Any issues I find in the wild once I get the scope outside again can likely be mitigated with the anti-backlash settings for the motor drive. If there is anything significant I find, I'll make an update! Regarding some of the slewing, anti-backlash, and cord wrap settings, I would have appreciated a little more information in the manual as to what the settings actually do and how they work. I did see an example where my scope attempted to go the long way around counterclockwise to a position that just should have been about 10 degrees clockwise. This was very likely due to bad settings in the aforementioned utilities. I made a few tweaks after that and the problem seems to be alleviated, though I am not exactly sure which setting did the trick! :-) At the end of the day, I have to say that for the money, this scope does everything it is intended to do. Have some realistic expectations going in. You are not going to get Hubble Space Telescope views out of this scope! But you will get a lot of enjoyment out of it if you take the time to set it up and align it properly. I did get a good view of a deep space galaxy, which as many have stated, was simply a distant smudge of stars. However, it was clearly visible amongst the background of distinct stars.

To begin, the photos are shaky and blurry because I shot them by trying to stick my phone close to the eyepiece, they do not do this scope justice, it is fantastic! I had very limited experience with telescopes, but the 127 SLT has blown away my expectations. I have seen the Orion's Nebula, rings of Saturn, bands of Jupiter and the 4 Galilean moons clearly. Various star clusters and a couple galaxies. Once you understand the setup and the must have upgrades you'll be ready to go. Pros: The scope is easy to assemble. The red dot is perfectly fine for what it is and gets you close enough. The 5" lens is more than enough to see the usual objects (moon, Saturn, Jupiter, and other Solar System Bodies). The first time i found the Andromeda Galaxy i was a bit disappointed as it just looked like a yellowish smudge in the sky, cool nonetheless. Then I observed Orion's Nebula and couldn't believe how good this little scope does, granted the tripod leaves much to be desired (but there are cheap work arounds, I'll explain in the cons. It's portable if you buy the right case which is great to get out of the city light pollution or to take camping. The tracking and auto alignments are great. Always perform the 2 star alignment as the 3 star align fails 9 out of 10 times, but 2 star is very good. Once 2 star is aligned you can activate tracking and the scope keeps the object you're viewing within frame or very close over a period of time, and you can let the computer drive you to your next object. It's super useful on cold nights and to not have to constantly correct where you're looking. Cons: the mount/tripod is not great, but I've mitigated vibrations and instability by buying cheap anti vibration pads on Amazon $20 and by loading a sandbag with 10lb weight and placing it on the plate of the tripod and this makes it 100 times better. This will be something I upgrade eventually for my own purpose, but I have no problems now and have no need to upgrade after the pads and sandbag trick. The standard pieces you'll want to replace and buy better one's, these pieces are always cheap that come with the scope, but I still use the 32mm for initially locating the object I'm looking for. You'll want something around a 25-32mm, 15mm, and a 9mm , and a 2x Barlow, this is all you need and you will be able to push your scope to its limits and on good nights with low atmospheric interference push a little past them. Further, i cannot say much on battery longevity in the scope as I immediately bought a cheap $8 adapter and used an extension cord for power until I bought the celestron mobile power supply for when I take it on the go. Overall, i wouldn't have changed my mind, this purchase was perfect, the tube didn't need alignment, the motors haven't messed up on me and i have nothing negative to say about this purchase. Recommended: buy the power supply, it's a game changer. Also, get the anti vibration pads and some way to weigh the tripod down, this makes a world of difference. Upgrade your eye pieces, you don't need anything crazy expensive, and buy a case to store your tube, tripod, and accessories, it makes storage and moving it a breeze. There are other well written reviews, so take your time and review what you need before buying. As my first telescope as an adult I'd rate this 9/10 for price and the ease of use and accessories built into the computer of the mount. Next scope will be a 10" lens with a solid equatorial mount base as i have no place for a Dobsonian in my current living situation. Good luck and clear skies!

Easy to assemble and simple to align. It took a few minutes to make a solar system align. After I was able to see a Moon and make a photo shoot with smartphone. The finderscope I changed because I didn’t not like it.