Celestron AstroMaster 90 EQ
refractors, max. useful gain: 213 x, lens diameter (aperture): 90 mm, focal distance: 1000 mm, relative hole: 11 :1, self-directed system, optical pipe length: 914 mm, weight: 10.4 kg
refractors, max. useful gain: 213 x, lens diameter (aperture): 90 mm, focal distance: 1000 mm, relative hole: 11 :1, self-directed system, optical pipe length: 914 mm, weight: 10.4 kg
Main Characteristics |
|
Types of Telescopes |
refractors |
max. useful increase |
213x |
Lens diameter (aperture) |
90 mm |
Focal Distances |
1,000 mm |
Relative openings |
11 :1 |
Resolution ability |
1.29 " |
Illumination of optics |
multilayered |
Length of optical piping |
910 mm |
Rayleigh's Criterion |
1.54 angles |
Dawes Limit |
1.29 angles |
Limiting stellar magnitude |
12.3 m |
Penetration ability (stellar magnitude) |
12.3 m |
Self-guided system |
|
Type of mounting |
equatorial |
Weight (disambiguation) |
13.9 kg |
Functions and features |
|
Number of eyeglasses in the kit |
2 |
Planting diameter of the eyepiece |
1.25 " |
Focal distances of eyeglasses |
10, 20 mm |
Optical magnification |
100x, 50x |
Turning Lens |
|
Revolving mirror |
|
Turning prism |
|
Optical searcher |
|
Pole Seeker |
|
Computerized mounting |
|
Automatic Attachment to the Sky |
|
Computer-based control |
|
GPS |
|
Clockwork mechanism |
|
Adjustment of fluency |
|
Fine-tuning mechanism |
|
Co-ordinating circles |
|
Statutory |
steel |