Hi,
Thanks Andrew and Ross.
Thought you all might be interested in this fabulous image taken by amateurs in Chile in 2008. They used a RCOS 14.5" Ritchey-Chrétien with Baader 2" FFC (Fluorit Flatfield Converter) working at f/37 - 13.7 meter focal length. The link is
http://www.verschatse.cl/nebulae/Eta...lus/medium.htm
They also wrote this up in an article for
Sky and Telescope (March 2009). For copyright reasons I can't give a comparison with Hubble and my image but when scalled down there appears to be some change in the lower lobe.
regards,
RichardJ