I have a friend who has this EL flat panel and he lent it to me. It produced excellent results so I wanted to buy one of my own to use. But I needed one with a U.S. power adapter and plug. It took nearly 3 mo the to find out how to get the U.S. adapter and then order it. When it arrived, it had a European adapter, so I couldn’t use it. I am still waiting to hear how I get a U.S. adapter. All this may be more a function of Gerd Neumann in Germany than OPT in the U.S.
I had never been satisfied with my sky flats taken at dusk or dawn. Prominent donuts remained which should have been removed with good master flat. The problem with sky flats is that the brightness changes rapidly and the exposure must change to the image to 2/3 or so of saturation. This means normalizing the background. With the Aurora flatfield panel the exposures are all the same length. The master flat works very nicely to give a uniform background and removal of donuts and gradients. And best of all, no need to rush to finish while the sun sets or rises. This is a very useful and effective tool for imagers.