Appendix A - Technical Specifications
Optiicall Speciifiicatiion
Design |
| ||
Aperture |
| 4 inches (102mm) | |
Focal Length |
| 52 inches (1325mm) | |
F/ratio of the Optical System | 13 |
| |
Primary Mirror: | Diameter | 102mm | |
| Coatings | ||
Secondary Mirror Spot Size | 1.25" |
| |
Secondary Obstruction | 34.4% by diameter; 11% by area | ||
Corrector Plate: | Material | ||
| Coatings | ||
Highest Useful Magnification | 240x | ( ~ 6mm eyepiece) | |
Lowest Useful Magnification (7mm exit pupil) | 15x | ( ~ 80mm eyepiece) | |
Resolution: Rayleigh Criterion | 1.36 arc seconds | ||
Dawes Limit | 1.14 arc seconds | ||
Photographic Resolution | 140 lines/mm | ||
Light Gathering Power | 212x unaided eye | ||
Near Focus standard eyepiece or camera | ~ 20 feet | ||
Field of View: Standard Eyepiece | 1.0º |
| |
: 35mm Camera | 1.51º x 1.04º | ||
Linear Field of View (at 1000 yds) | 52.5 feet | ||
Magnification: Standard Eyepiece | 55x |
| |
: Camera | 27x |
| |
Optical Tube Length | 13.5 inches | ||
Weight of Telescope | 11 Lbs. | ||
Ellectroniic Speciifiicatiions
Input Voltage | 12 | V DC Nominal |
Maximum | 18 V DC Max. | |
Minimum | 8 V DC Min. | |
Batteries Required | 8 AA Alkaline | |
Power Supply Requirements | 12 | |
Mechaniicall Speciifiicatiions
Motor: Type Resolution
Slew speeds
Hand Control
Fork Arm
DC Servo motors with encoders, both axes
.26 arc sec
Nine slew speeds: 4º /sec, 2º /sec, 1º/sec, .5/sec, 32x, 16x, 8x, 4x, 2x
Double line, 16 character Liquid Crystal Display 19 fiber optic backlit LED buttons
Cast aluminum, with integrated hand control receptacle
Software Speciifiicatiions
Software Precision | 16 bit, 20 arc sec. calculations |
Ports | |
Tracking Rates | Sidereal, Solar, Lunar and King |
Tracking Modes | |
Alignment Procedures | AutoAlign |
Database | 25 user defined programmable object. |
| Enhanced information on over 100 objects |
|
|
Total Object Database | 4,033 |
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