Lens Type | Doublet Apochromatic Prime Lens |
Focal Length | 559 mm |
Diameter | 81 mm |
Focal Ratio | f/6.9 |
Image Circle | >full frame |
Focuser | 2.5" R&P Focuser |
Adapter Included | M63 → 2" Visual Back 2" → 1.25" Visual Back |
Optional Flattener | FLAT 6AIII 0.8x |
Camera Format | Full Frame APS-C M4/3 |
OTA Weight | 3.53 kg |
Tube Length | 460 mm - 560 mm |
ZenithStar 81
Updated Aug 24, 2026• by WO Team 1 min read