OTA · 2017–
Takahashi FSQ-85EDX
Key specifications
| Aperture | 85 mm |
|---|---|
| Focal length | 450 mm |
| Focal ratio | f/5.3 |
| Optical design | Quadruplet APO |
About
85 mm modified-Petzval ED quadruplet astrograph, 450 mm focal length at f/5.3. Two ED elements (objective doublet plus an air-spaced Petzval doublet acting as field flattener) deliver a flat, color-corrected field for full-frame imaging.
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