Quote:
Originally Posted by skysurfer
Many observers say that from 40cm aperture, colors are visible in (bright) emission nebulas like M42 or NGC 3372.
But some claim a 20cm shows colors in the Orion nebula. I see no more than pale bluish with my 25cm Dob.
I see the Carina Nebula with a 10cm just monochrome as the aperture is too small I think.
Planetaries are a different story, I can see a clear blue color in the Cat Eye nebula NGC6543 with a 10cm but it looks more like a blue star more blue than an O or B star. In a 25cm Dob I see a small bluish ball. This one has a high surface density.
What are your experiences ?
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Seeing Colours in deep sky objects is more down to your own colour perception under very low light conditions.
I see Pink in the Orion Nebula, Red in PN IC 418, and only Grey/white in the Eta Carina nebula.
Also I think you have to train your eye to see colours, as they are very subtle.
Cheers
