|
|
|
|
|
AstroMaster |
|
|
|
|
Specifications |
| 21061 | 21063 | 31043 |
|
| AM 70 AZ | AM 90 AZ | AM 114 AZ |
|
|
|
|
|
Optical Design |
| Refractor | Refractor | Newtonian |
Aperture |
| 70mm (2.8") | 90mm (3.5") | 114mm (4.5") |
Focal Length |
| 900mm | 1000mm | 1000mm |
Focal Ratio |
| f/13 | f/11 | f/9 |
Secondary Mirror Obstruction |
| n/a | n/a | 31% - 10% |
Optical Coatings |
| Fully coated | Fully coated | |
Finderscope |
| Star Pointer | Star Pointer | Star Pointer |
Diagonal 1.25" |
| Erect Image | Erect Image | n/a |
Eyepieces 1.25" |
| 20mm (45x) | 20mm (50x) | 20mm Erect |
Apparent FOV |
|
|
| Image (50x) |
| 10mm (90x) | 10mm(100x) | 10mm (100x) | |
Angular Field of View w/standard eyepiece |
| 1.1° | 1.0° | 1.0° |
Linear FOV w/standard eyepiece - |
|
|
|
|
ft/1000yds |
| 58 | 53 | 53 |
|
|
|
|
|
Mount |
| Altazimuth | Altazimuth | Altazimuth |
Pan Handle Control for Altitude |
| yes | yes | yes |
Azimuth Lock |
| yes | yes | yes |
Tripod Leg Diameter 1.25" |
| yes | yes | yes |
| yes | yes | yes | |
|
|
|
|
|
Highest Useful Magnification |
| 165x | 213x | 269x |
Limiting Stellar Magnitude |
| 11.7 | 12.3 | 12.8 |
Resolution |
| 1.98 | 1.54 | 1.21 |
Resolution |
| 1.66 | 1.29 | 1.02 |
Light Gathering Power |
| 100x | 165x | 265x |
|
|
|
|
|
Optical Tube Length |
| 36" (91cm) | 36" (91cm) | 20" (51cm) |
Telescope Weight |
| 18 # (8.2kg) | 20 # (9kg) | 17 # (7.7kg) |
|
|
|
|
|
Note: Specifications are subject to change |
|
|
| |
without notice or obligation |
|
|
|
|
|
|
|
|
|
24
