OTA · 1992–2012
Takahashi FS-78
Key specifications
| Aperture | 78 mm |
|---|---|
| Focal length | 624 mm |
| Focal ratio | f/8 |
| Optical design | Fluorite Doublet |
About
78 mm f/8 air-spaced fluorite doublet apochromat of Fraunhofer design (fluorite element at the front), ~630 mm focal length. A classic planetary/lunar refractor of the FS era; superseded by the FC-76D models.