There is a total solar eclipse coming up on August 21st in the US.  What are the best approaches for using the OSMO Mobile to get pictures during this event?

  

For those at or near the totality area, the process lasts about 2 hours with the totality lasting about 2.5 minutes.  It seems a number of key things might be involved including filters (the sun is very bright before) and magnification aids attached to the smartphone.

  

The sun/moon are only about ½ a degree in size, so some sort of optical zoom is likely needed to get larger images.

I'd like to know this as well.  My home is in TN and in direct path of totality.