Lens Type | 5 Element |
Focal Length | 535 mm |
Diameter | 81 mm |
Focal Ratio | f/6.6 |
Image Circle | 40 mm |
Focuser | 2" R&P Focuser DDG Focuser |
Focuser Travel Length | 80 mm |
Adapter Included | 2" → 1.25" Visual Back |
Optional Flattener | No Flattener Required |
Camera Format | Full Frame APS-C M4/3 |
OTA Weight | 3.7 kg / 8.16 lbs |
Tube Length | 440 mm - 484 mm |
GTF 81
Updated Aug 24, 2026• by WO Team 1 min read