OK - I see where you're coming from Rod and now suspect you may have a point. The Naglers tend to manage about 95% plus FOV before the seagulls and comets appear but I still just cannot get on with them - the "black bar" thing almost every time... and I've pretty much tried them all. My only other options appear to be the Pentax XW range. I'l have a look around and see what I can borrrow
Arthur