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| Optical Design: |
Refractor |
| Aperture: |
70mm (2.8") |
| Focal Length: |
400mm (15.74") |
| Focal Ratio: |
f/5.7 |
| Focal Length of Eyepiece 1: |
20mm (0.78") |
| Magnification of Eyepiece 1: |
20x |
| Focal Length of Eyepiece 2: |
10mm (0.4") |
| Magnification of Eyepiece 2: |
40x |
| Barlow Lens: |
Not Included |
| Finderscope: |
5x24 |
| Star Diagonal: |
Erect Image, 45° 1.25" |
| Optical Tube: |
Aluminum |
| Highest Useful Magnification: |
168x |
| Lowest Useful Magnification: |
10x |
| Limiting Stellar Magnitude: |
11.7 |
| Resolution (Rayleigh): |
1.98 arc seconds |
| Resolution (Dawes): |
1.66 arc seconds |
| Light Gathering Power (Compared to human eye): |
100x |
| Optical Coatings: |
Fully Coated glass optics |
| Optical Tube Length: |
431.8mm (17") |
| Optical Tube Diameter: |
98.4mm (3.87") |
| Optical Tube Weight: |
1.5 lbs (.68 kg) |
| Dovetail: |
N/A |