Jazzmatazz

53 minutes ago, John said:

When the planets are very low down they do not look as crisp and clear as they do when they are higher in the sky. You can also sometimes notice what looks like chromatic aberration but this is actually caused by atmospheric dispersion due to the low altitude of the target.

Since the planets have been low in the sky over the past couple of years I have tended  to prefer the views of planets through my refractors rather than my 12 inch dobsonian. When they have been higher in the sky the dobsonian has produced stunning views though.

I doubt the eyepieces are to blame in this instance.

 

Just curious, are you tempted by bigger dosbonians? do you think a 20" dobson will give much more detail on planets? i've been thinking about a new lightbucket!

Hey guys, I’ver tried several different eyepieces (televue, Meade, etc) and I’m not too happy about the results I’m getting observing Jupiter and Saturn on my 12” F5 Dobsonian.

It’s not too easy to focus, I don’t really know if it’s coma or chr aberration. Could you give some advice as to how identify these problems and what solutions exist

thabk you all

without a  doubt the Nextstar!!!! Aperture rules!!!!