OTA · 2013–
Takahashi FC-100DC
Key specifications
| Aperture | 100 mm |
|---|---|
| Focal length | 740 mm |
| Focal ratio | f/7.4 |
| Optical design | Fluorite Doublet |
| Back focus | 161 mm |
| Weight | 2.8 kg |
All specifications
| Lens coating | Hard multicoatings |
|---|---|
| Focuser type | 31.75mm rack-and-pinion |
| Tube length | 815 mm |
About
100 mm fluorite Steinheil doublet apochromat, 740 mm focal length at f/7.4. Rear-element fluorite with eco-glass front; the lightest 4-inch in the line, optimized for visual use with imaging support via dedicated correctors.