The DayStar Quantum PE Sodium D 0.4A Solar Filtercaptures Sodium D, a line brighter than Calcium and Hydrogen-Alpha! Can be used un-heated to observe the lower two emissions lines, or heated to view the higher two lines.
- Observe High-resolution Sunspot Detail, Plague, Granulation, Flare Footprints.
- For Professional Research Use.
- Can be Used for Dopplergram Velocity Image.
- Wavelength: 5890.0A.