[SteveR]

Very cool shots! Was she using a few filters on the lens? It looks like the lens is capturing the ring of the outer filter. They make step up rings to allow you to use more filters at a wider diameter so they don't get captured by the lens, like if the lens has a 52mm thread on it you can use one filter, then say a 52mm to 58mm adapter ring, then a 58mm filter, then if you want to run more, then a 58mm to 62mm ring and so on.