A new solar telescope is about to be established in the solar tower at National Astronomical Observatory Rozhen, Bulgaria (41° 41’51″; N 24° 44’19″; E, 1759 m). The telescope is currently under construction and is expected to receive its first light in 2022. The 30-cm Schmidt-Cassegrain reflector is going to be focused on chromospheric observations.
| Parameter | Value |
| Aperture D | 305 mm |
| Focal length F | 3050 mm |
| Effective focal length Feff | 5000-15000 mm |
| Field of view | 2.5’ × 2.5’ – 10’ × 10’ |
| Spectral range | 656.28 nm (Hα) |
| Spatial resolution | 0.5’’ |
| Line-of-sight velocity resolution | 0-10 km/s |
