Measuring a corona round the Sun

 

There was a corona around the Sun on Saturday made clearer by polarising lenses. To the eye it was clearly yellow and red around the outside. The Sun subtends 0.5 degrees and thus would be covered by my little finger. This picture shows that the central section would subtend about 2 degrees. That doesn't seem too bad on my bright centre. My image will be overexposed. Perhaps I was seeing more of the outer rings.