Thanks Greg.
Yeah they sure do. Lot of fun. I have a bit more experimenting to do now with lens stops and exposures duration until I nail the field 100%. Still some aberrations on the outer edges.
I would experiment also with a minus violet filter as these lenses usually aren't APO and they are likely to show violet halos. With the lens stopped down, 2x2 binning up your sleeve (not necessarily needed) and a minus violet filter plus your UV/IR filter you could be spot on.
Greg.