I showed the M13 IFN/galactic cirrus to many at the Oregon Star Party with my 30"F2.7. It's a great view - the cluster (with star colors), the galaxy, the fainter galaxy, IFN... All observers saw the IFN easily. In a big scope these IFN are bright - almost like Andromeda Galaxy in a small scope in bad skies. And yes, depending on visibility, in the darkest skies, they form a horseshoe around M13 with brighter/fainter sections. Mel Bartels