OTA · 1998–2009
Takahashi FSQ-106N
Key specifications
| Aperture | 106 mm |
|---|---|
| Focal length | 530 mm |
| Focal ratio | f/5 |
| Optical design | Quadruplet APO |
About
Original 106 mm modified-Petzval quadruplet astrograph, 530 mm focal length at f/5, using a mineral-fluorite crown rather than the ED glass of the later EDX models. The longer-tubed forerunner of the current FSQ-106 family.