Manuals and User Guides for Celestron NexStar SLT. We have 1 Celestron NexStar SLT manual available for free PDF download: Instruction Manual. View and Download Celestron NexStar SLT quick setup manual online. Celestron NexStar SLT: Quick Setup. NexStar SLT Telescope pdf manual . SkyQ Link WiFi Module Version 2 Manual – Celestron provides this sheet for download for both modules. CPC and CPC NexStar SLT Series. NexStar+ Hand.

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As a result, I have never been too keen to recommend them to beginners. However, inCelestron came up with a new method of implementing the initial alignment of a scope. Called SkyAlign it is wonderfully simple to use. It is available with their low-cost Nextstar range making it possible for a beginner to acquire an easily used go-to telescope for a very reasonable sum of money.

The Nextstar range uses the same computerised mount and tripod on which is mounted a range of telescopes: To give a mm focal length in a short tube, a lens is incorporated onto the mm design. I chose to borrow and review the SLT which uses a mm 5. This has a small, but worthwhile, increase in aperture over the previously available budget reflectors which came with mm diameters.

The Optical Tube Assembly. I must honestly say that I was surprised and impressed at the f5 Newtonian tube assembly. It seemed in several ways to be a real improvement on the mm Newtonians that I have seen.

The four arms of the spider support the secondary mirror. They are made of thin steel tensioned by screws around the optical tube.

Celestron NexStar 130SLT Quick Setup Manual

This is far, far better than the thick metal vanes that I have seen on several mm Newtonians and less image degradation will result as a consequence. Though the scope comes with two 1. As we will see below, 310 finder is hardly used except when initially aligning the scope. A red dot finder appears to project a red dot on the sky which is aligned with the target star or planet. For this purpose they are vastly better than the cheap 6 x 30 which in practice are sometimes stopped down to nearer 10 straight through finders.

The finder has a quick release mount. The inside of the barrel was rather shiny and this could. Ditto re the barrel interior. Their performance will be described below. So far, very good. Observing ones eye reflecting in the secondary and primary mirrors through the eyepiece indicated celestrno the collimations was not far off. A small ring on the centre of the primary mirror helps to carry out collimation 1130 necessary.

A few small points: It is meant to be a little further to that side, but not as much as I observed. This would have rather little consequence though. We will see how the telescope performed in practice below. The Alt-Azimuth mount and tripod. An Alt-Azimuth mounts follow an object across the sky by using two motions: The rates at which the two drive motors run will vary during this time.

For example, as an object passes transit, the altitude of the object does not change significantly.

Celestron NexStar SLT Manuals

This is in contrast to an equatorial mount when, apart from small corrections, only one drive is running. One disadvantage of an Alt-Az mount is that the field of view rotates preventing the taking of long exposure astro -photographs.


But, to be honest, this is not a scope to hang large cameras on. The mount uses a single fork rather than the two forks used in most Alt-Az celeetron. This obviously limits the weight that can be supported slg to around 5kg. More obviously it does allow the tube, if pushed sideways, to move significantly more than if a dual fork were used. This would allow other optical tubes to be fitted provided they are not too heavy. The earlier Celestron GT telescope used a clam shell mount so that the position of the eyepiece and finder can be adjusted and also the tube can be balanced dependent on the eyepiece used.

The tube on the SLT has a fixed wedge so rotation of the tube is not possible. I did not find this cflestron significant problem. It must be correctly located as I had no problem in adding Celesteon lenses or using a heavy 2 inch eyepiece. The cover on the base of the mount opens to allow the insertion of 8 AA batteries in two packs of 4.

What pleased me greatly was that the mount appeared to work fine with a set of rechargeable batteries even though their voltage is a little less.

There is a socket to provide an external 12 volts from a mains adapter, car lighter socket or external battery These are all additional accessories. The mount came already mated to its tubular tube stainless steel tripod. This is certainly better than the aluminium tripods that have been used on this class of telescope before but it is still very light.

I have often advised owners to fill their aluminium tripods with sand both to increase celestroon and to improve the damping of the system.

A bubble mnaual is incorporated into the nexatar so the mount can be levelled but, as we will see, if SkyAlign is used levelling the mount is not too critical. Setting up and aligning the scope. Earlier in the day I had aligned the red dot jexstar with the optical axis of the telescope by observing the top of a distant street lamp. I set up the telescope with the tube pointing roughly south at 45 degrees. The tube can be moved in altitude relatively easily, but the clutch seems much tighter in azimuth and I have only ever moved it under motor control.

I switched on the telescope and the controller asked me to choose a country and then a city United Kingdom celesyron Manchester. It then asked me the date and time which I entered using the numeric keypad.

I was then asked which method of alignment I wished to use.

Celestron NexStar SLT Computerized Telescope Manual

I was asked to use the red dot finder to point to a first bright object. You are then asked to centre it in the field of view of the telescope. The computer automatically reduces the slewing speed at this point. I was then asked to slew the telescope to a second object and, in the same way, I aligned it on manul very bright object low in the South Sirius, as I suspect you may guess. One should try to get manjal least 90 degrees between the objects so this seemed a reasonable slew.


Through the murk I could see a bright object up to my left. When I aligned on it I realised it was the planet Saturn! I should have known that it was Saturn, but it was very difficult to get ones bearings with so few stars visible. This did prove that, just as Celestron say, planets can be used as well as stars and at least for this object I did not initially know what it was that I was aligning on — a great bonus for real beginners.

It had worked first time manua, of the box! CapellaSirius and Saturn. But I was away. The numeric keys have letters or words on them relating to the various catalogues held in the computers memory. The Messier Catalogue of just over objects. It also contains just over deep sky objects and includes objects in the southern mahual as well. Lists the Moon and the planets visible in the sky at the time of observation. Many of these will be rather faint for this sized telescope. One that should be easily visible is NGCa nice 9 th magnitude galaxy in Leo.

I am surprised was missed out by Messier and it is not included in the Caldwell catalogue either. The brightest stars in the SAO Smithsonian ………. Takes you on a tour of the best objects in the sky at the time of observation. Accesses a set of object lists such as named stars and named objects. For example Sirius and the Dumbbell Nebula.

Selecting from the Constellation list gives the objects seen in each constellation. The manual states that objects are included. This is also Caldwell 39 and NGC Down and clockwise it slewed. I could not make out the nebula but I could see the line of three stars and the 4 stars of the trapezium at its heart.

I then had a quick look at the clusters in Auriga: M36, 37 and All appeared in the field of view though were barely visible through the haze. Then up to M35 in Gemini. Nicely centred In the field and more obvious than the Auriga clusters as this part of the sky was clearer.

The image was very clean and focus was easy to find. Again, indications of a good mirror and collimation. However the 9mm eyepiece at x72 could not really give enough magnification to see Saturn at its best and so I added a Televue x2. During moments of very good seeing I could see the Cassini division and possibly a hint of a band around the surface — by this time the skies were clearing somewhat.

The optics of this scope are clearly up to the mark! So the first accessory that a purchaser should buy is a x2 Barlow. Used with the 9mm eyepiece, this will give the effect of a 4. My final move was back to Capella to do a little star testing — comparing the intra and extra-focal images.