OTA · 2017–2024
Coronado SolarMax III 90
Key specifications
| Aperture | 90 mm |
|---|---|
| Focal length | 800 mm |
| Focal ratio | f/8.9 |
| Optical design | Achromatic Refractor |
All specifications
| Lens coating | FMC |
|---|---|
| Focuser type | Dual-speed R&P |
| Dovetail | Vixen |
About
90mm f/8.9 dedicated hydrogen-alpha solar refractor doublet with external etalon, RichView + T-Max tuning, and a dual-speed rack-and-pinion focuser. Available single- or double-stack with BF15 blocking filter.