OTA · 2005–
Takahashi TOA-130
Key specifications
| Aperture | 130 mm |
|---|---|
| Focal length | 1000 mm |
| Focal ratio | f/7.7 |
| Optical design | Triplet APO |
About
130 mm Ortho-Apochromat air-spaced triplet, 1000 mm focal length at f/7.7. Uses ED elements front and rear to drive focal shift across 436–656 nm below ±0.01 mm — about 1/100 the residual of a typical apo. A top-tier visual and imaging refractor.