OTA · 1988–
Takahashi FCT-150

Key specifications
| Aperture | 150 mm |
|---|---|
| Focal length | 1050 mm |
| Focal ratio | f/7 |
| Optical design | Triplet APO |
About
150 mm fluorite triplet apochromat at ~f/7, the 6-inch 'reference standard' of Takahashi's premium fluorite-triplet line. A fabulously expensive flagship in its day, filling the 6-inch slot that the doublet range never offered.