Hi All,

There is presently a hot discussion about «*seeing colors*» on an other great astronomy forum.
A lot of guys have seen different colors on nebulae, particularly on PN, and I must say that it is true for me.
But, strangely, my report of a detail observation and sketch of Dumbell's nebula doesn't notice any color, neither the green of OIII line nor the red of H alpha.
http://www.deepsky-drawings.com/m-027-t635/dsdlang/fr


M 27 t635 bl 2011 09 06.jpg


Have you heard about, or seen them*? What hue ? Under what skies and scope*?
Thanks for your replies

Bertrand
http://www.deepsky-drawings.com