I appreciate the tough design challenges to pack so much into a compact, wide-field scope. I'm an experienced imaging with longer focal length scopes, so this was a challenge. Getting a flat-field across entire image circle is challenging, but with persistence I have it acceptable (very slight star elongation in one corner but can live with it for now, haven't had time to debug/test what is wrong if it is tilt or backfocus wrong on my adapters). Adapters for the scope are available, although M57 is not a popular size so very limited adapters other than from Hutech. I think this will be a keeper in my collection.