OTA · 2018–
Takahashi FOA-60Q
Key specifications
| Aperture | 60 mm |
|---|---|
| Focal length | 900 mm |
| Focal ratio | f/15 |
| Optical design | Fluorite Doublet |
About
FOA-60 fitted with the dedicated 1.7x extender module, converting the 530 mm f/8.8 doublet into a 900 mm f/15 flat-field system. With the extender installed the design becomes a quadruplet and reaches a theoretical Strehl ratio near 99.8% — the highest of any Takahashi refractor.