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| Aperture: | 80mm | |
| Focal Ratio: | F/6.8 | |
| Focal Length: | 545 mm | |
| Objective Type: | FPL-51 ED Glass, Doublet, Air Spaced, APO Fully Multi-Coated | |
| Resolving Power: | 1.45" | |
| Limiting Magnitude: | 11.3 | |
| Lens Shade: | Retractable | |
| Focuser: | 2" 360 Degree Rotating Camera-angle Adjuster, 1:10 fine focus Focuser Travel Length 3.15" (80mm) 1.25" Adapter | |
| 1.25" Adapter Brass: | Compression Rings | |
| L- type Mount: | L Bracket Based | |
| Field Stops: | 10 Baffles | |
| Tube Diameter: | 90mm | |
| Tube Length: | 16.9" (430mm) Fully Retracted / 19.7" (500mm) Fully Extended | |
| Tube Weight: | 2.8 kg | |
| Case: | Aluminium Case (Standard) | |
| Case Dimensions (WxHxD): | 22.4" x 12.6" x 8.3" (57cm x 32cm x 21cm) (Water Resistant) | |
William Optics ZenithStar 80mm II ED APO Doublet f/6.8 Telescope, w/ Custom Aluminum Case ZS80-ED-OTA