|
| |
NexStar 11 GPS
The NexStar 11 GPS is the
culmination of years of engineering research and development delivering the
ultimate instrument in Go-To technology
and astro imaging. This large aperture telescope with carbon fiber tube is
the first instrument of its kind to boast an integrated Global Positioning
System and electronic compass, combined with the NexStar system, which makes
this the most advanced telescope on the market.
It’s
so advanced that as you turn it on, the integrated GPS and compass system
automatically pinpoints your exact location and points to your first
alignment star. No need to enter the date, time, longitude and latitude or
even know the position of north.
Also new is our advanced database with filter limits that allows you to
customize the many database object lists. With the "filter limits" feature
the NexStar database will display only those objects that are above the
horizon for your exact date, time and location. Or, if the seeing conditions
are bad, you can filter out objects below a certain altitude above the
horizon. So as you scroll through the database lists of objects, only
objects within the altitude limits you set will be displayed on the hand
control. No other telescope on the market offers this advanced and useful
feature.
The NexStar 11 GPS is the most advanced, easiest to use telescope we've
ever designed. It's the ultimate large aperture, portable telescope.
NexStar 11
Specifications:
 | Celestron Part Number for NexStar 11GPS:
11053 |
Optical:
 | 279mm (11") Diameter
Schmidt-Cassegrain |
 | Focal Length
of 2800mm |
 | Focal Ratio of f/10
|
Software:
 | 40,000+ Object Database
|
 | Storage for Numerous User-Defined Objects
|
 | Database Filter Limits for Creating
Custom Object Lists |
Electronics:
 | Computerized Hand Control
with Backlit, Dual Line Liquid Crystal Display (LCD). |
 | Permanent Periodic Error Correction -
Permanently saves and plays back corrections to reduce periodic error to a
minimum. |
 | Designated Autoguider Port |
 | RS232 Compatible PC Port |
 | Auxiliary Ports for Add-on NexStar
Accessories |
Mechanical:
 | Dual aluminum fork arms
with carrying handles and hand control receptacle.
|
 | 5.625" Precision Bronze Gear on
Both Axes |
 | 9.5" Friction Roller Bearing
|
 | 16 bit, 20 arc second Resolution
|
 | Fastar Compatible Optical Tube for
F/2 CCD Imaging |
 | Adjustable Height Tripod
|
 | Telescope Weight: 65 lbs.
|
 | Tripod Weight: 26 lbs.
|
 | Made in the U.S.A.
|
NexStar 11 Includes:
 | Premium 40mm (70x) 1¼"
Plössl Eyepiece |
 | 9x50 Finderscope |
 | Star Diagonal - 1¼" |
 | Visual Back - 1¼" |
 | AC Adapter |
 | Adjustable Height Heavy Duty Tripod
|
 | Computer Hand Control for Go-To Tracking
with over 40,000 Object Database |
 | RS-232 Port to Communicate with a PC
|
 | Nine Available Slew Speeds
|
|
Fastar
Celestron’s long history of being a leader in
innovation began in the early 1960’s when it was the first to mass produce the
Schmidt Cassegrain Telescope (SCT), known to all as the C8. Today, the term "C8"
is synonymous with the SCT. Celestron was also the first to introduce a Schmidt
Camera and a completely computer automated fork mounted telescope to the amateur
astronomer. In keeping with this tradition of innovation, Celestron has designed
multi-focus Fastar compatible SCT telescopes. In addition to using your
telescope in the traditional photo/visual configurations, these telescopes are
optimized for f/2 (f/1.95 with the C8 and f/2.1 with the NexStar 11 and CM1400)
prime focus CCD imaging. Now, all Celestron worm driven 8", 11" and 14" Schmidt
Cassegrain Telescopes are equipped with the Fastar compatible optical system,
with removable secondary mirror, as a standard feature. You can easily convert
Fastar compatible telescopes to f/2 prime focus use in a matter of seconds!
 |
Fig. 1 |
 |
Fig. 2 |
| Figure 1 on the
top is the conventional SCT optical system. The Fastar configured optical
system on the bottom, figure 2, uses a corrector lens assembly with a CCD
camera placed at prime focus where the Cassegrain secondary mirror would be. |
The
Fastar lens assembly comes with the optical lens assembly, and protective holder
for the secondary mirror while removed from the telescope. A rear cell
counterweight to ensure proper balance when imaging at f/1.95 is also included
with the 8" and 11" systems.
With the Fastar's f/2 focus, your telescope can
provide a field of view larger than CCD systems twice its chip size and costing
thousands of dollars more. Objects like M33 and the Veil Nebula, which were
previously too large for the narrow fields of view of most commercial CCD's,
will easily be seen with the Fastar system. The Fastar compatible C8 used at
f/1.95 delivers a field of view 5 times wider than imaging at f/10 and requires
exposure times that are 25 times shorter. No more spending valuable observing
time trying to locate and frame deep-sky objects in a small field of view.
Unguided track and accumulated images of 30 seconds or more capture deep sky
objects in their full glory. It's like having a professional observatory in your
own backyard!
|
Telescope specification
using Fastar Lens Assembly |
| |
C8 |
NexStar 11 |
CM-1400 |
| Focal Length |
400mm |
587mm |
747mm |
| F-Ratio |
F/1.95 |
F/2.1 |
F/2.1 |
| Field of View*(arc min) |
41 x 31 |
28 x 21 |
22 x 17 |
|
(degrees) |
.68° x .52° |
.46° x .35° |
.37° x .28° |
*Field of view when using the SBIG
ST-237 CCD Camera with a 4.7mm x 3.6mm chip
|