In this image it can be seen how large the corona was during the eclipse, ranging up to 5.000.000 km in this image and even more outside of the image coverage. In total there are about 30 stars visible in the image up to a magnitude of +9.5.
I was astonished to see how far the corona could be distinguished in the images, and will never forget the sight of the streamers as they were visible...

Solar Eclipse Corona Annotated by Andre van der Hoeven, on Flickr
This is an image showing the eclipse as I experienced it from Teton Village. It was really a marvellous sight!

Totality Eclipse 2017 Grand Teton by Andre van der Hoeven, on Flickr