16.0-35.0 mm f/4.0
I saw you did red rainbow: https://earthsky.org/earth/what-makes-a-red-rainbow
Check out this photo, from this year's monsoon. Photo taken as the monsoon returned at sunset, in late August, in Tucson, AZ
It had been dry for days - hot as well. Tucson needed the monsoon.
Red rain at sunset- amazing to see.