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.

Main parameters of the telescope

• Parameter
• Aperture D
• Focal length F
• Effective focal length F_eff
• Field of view
• Spectral range
• Spatial resolution
• Line-of-sight velocity resolution

• Value
• 305 mm
• 3050 mm
• 5000-15000 mm
• 2.5’ × 2.5’ – 10’ × 10’
• 656.28 nm (H_α)
• 0.5’’
• 0-10 km/s