Sodium will give high resolution sunspot detail, plague, granulation, and possibly the super-granulation depending on resolution and seeing of the observer.

Sodium can also show flare footprints, also known as flare kernels.

The line is brighter than both Calcium and even Hydrogen Alpha. So it's going to be very easy for observers to see and the exposures will be very short.

We'll be doing D2 line on 5890

Sodium D line Quarks will all be 0.5 or narrower.