Yes, Sidonio by Sidonio = Sidonio squared = lots of Sidonio's ...
Martin it is very low signal that had to be pushed pretty hard to reveal so it appears a little patchy in the outer areas. The very outer shell is incredibly faint, I could have kept it perfectly smooth but I would have lost this very faint stuff, the aim of this image was to reveal the extremely faint outer shells that are not usually seen while at the same time keeping the more commonly revealed inner details in good render. A larger faster aperture would reeeeeeally help

...imaging such faint stuff with a 6" scope at F7.5 is like trying to drain a keg of beer by sucking it out through a straw...hmmm...beeeeeer

(Homer Simpson)
Mike