| Optical Design: |
Refractor |
| Aperture: |
80mm (3.1") |
| Focal Length: |
400mm (15.74") |
| Focal Ratio: |
f/5 |
| 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: |
189x |
| Lowest Useful Magnification: |
11x |
| Limiting Stellar Magnitude: |
12 |
| Resolution (Rayleigh): |
1.74 arc seconds |
| Resolution (Dawes): |
1.45 arc seconds |
| Light Gathering Power (Compared to human eye): |
131x |
| Optical Coatings: |
Coated glass |
| Optical Tube Length: |
457.2mm (18") |
| Optical Tube Diameter: |
98.4mm (3.87") |
| Optical Tube Weight: |
2.4 lbs (1.08 kg) |
| Dovetail: |
Vixen/CG-5 Dovetail bar |
