Basic Information about the NexStar SLT Series
|In February of 2005, Celestron introduced a new line of computerized
scopes - the NexStar SLT. Utilizing a new upgradeable NexStar hand control, the
NexStar SLT series is quite similar to the NexStar GT series and in fact
replaces it in the model lineup.
The NexStar SLT is offered in 60, 80 and 102mm refractor models and 114
and 130mm Newtonian reflector models. Introductory prices range from $250 for a NexStar
60 SLT up to $420 for a NexStar 102 SLT.
Optical performance of the 60 and 114 models are as I described for the corresponding NexStar GT models in my book, The NexStar User's Guide. The 80 is the same optical tube as the NexStar 80 GTL described in the NexStar User's Guide updates section here on the web site. The 130 is the same optical tube as the NexStar 130 GT described in the NexStar User's Guide updates section. The 102 (pictured to the right) is an f/6 version of the optical tube found on the NexStar 102 GT which I described in the NexStar User's Guide updates section. The longer focal length reduces chromatic aberrations, producing a sharper image than the f/5 version found on the 102 GT, while other optical performance measures are basically the same.
The mount has been significantly upgraded from the NexStar GT:
The new hand control sports the latest version of the NexStar firmware. This includes features such as Identify and Constellation Tour. This hand control responds to the same PC commands (via the RS-232 port on the bottom) as the NexStar 8/9.25/11 GPS, so programs compatible with the NexStar GPS are compatible with the NexStar SLT.
The biggest news regarding the new hand control is user upgradeability and the new alignment methods. Future upgrades to the hand control firmware will be available for download via the Internet and owners can apply the upgrades themselves. The new alignment methods are SkyAlign, Auto Two Star Align (first available on the NexStar 8i Special Edition), Solar System Align and One Star Align. In addition to the new alignment methods, the new hand control still has Two Star Align. Removed since the NexStar GT are Quick Align and Auto Align. See the Alignment Guides section of this web site for details on the new alignment methods.
Additional information is found here on Celestron's web site.