 |
Celestron
NexStar 4GT Maksutov-Cassegrain
 |
Optical
Design |
102mm
(4.0") Maksutov |
Focal
Length |
1325mm
f/13 |
| Finderscope |
Starpointer |
Mount |
Motorized
Altazimuth |
| Eyepiece |
1-1/4"
-25mm (53x)
1-1/4" -10mm (133x) |
| Star
Diagonal/Erect Image Eyepiece |
1-1/4" |
| Accessory
Tray |
n/a |
| Tripod |
pre-assembled
aluminium |
CD
ROM |
The
Sky L1 & NSOL |
| Hand
Control |
Fully
Computerized |
|
Slew
Speeds |
Nine
slew speeds |
| Tracking
Rates |
Sidereal,
Solar and Lunar |
Tracking
Modes |
EQ
North & EQ South |
| Alignment
Procedures |
AutoAlign,
2-Star Alignment,
Quick Align |
| Database
|
40,000+
objects |
 |
Highest
Useful Magnification |
240x |
|
Lowest
Useful Magnification |
15x |
Limiting
Stellar Magnitude |
12.5 |
| Resolution:
Rayleigh |
1.36
arcseconds |
Dawes
Limit |
1.14
arcseconds |
| Photographic
Resolution |
140
lines/mm |
Light
Gathering Power |
212x
unaided eye |
| Field
Of View: standard eyepiece |
1
degree |
Linear
FOV (@1000 yd.) |
52.5
ft. |
|
Secondary
Mirror Obstruction |
1.38"
(11% by area,
35% by diameter) |
Optical
Coatings |
Aluminium/Multi-Coated |
| Optical
Tube Length |
13.5" |
Telescope
Weight |
11
lb. |
|
 |
