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Old 01-04-2016, 12:46 PM
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Stonius (Markus)
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Join Date: Mar 2015
Location: Melbourne
Posts: 1,508
This is currently where I'm at. Suggestions for improvement?

Here are the results of a session I did last night with an 8" f/6 dob.

http://markusstone.com/hosted_files/...t%20Mosaic.jpg

I know I've seen so much more detailed shots around here, so I'm wondering what I need to change, as seeing was pretty good for me last night, and I'm confident that my collimation was as good as it gets on this scope.

I shot video using a Canon 5D at ISO 800 projected via a bintel 2" barlow coupled with a 9mm TV Nagler (yes, I know, polar opposites in optics, but it's what I have) held in place by a rig that is not ideal in that it is very adaptable, which means it's squared by eye.

You'll notice an artifact on Jupiter in the form of a line that goes roughly from pole to pole. I literally have no idea what this is, though I've seen it before on my pics. Seems to be a processing artifact.

Saturn was grainy on account of having to up the ISO from 800 to 6400 to get an exposure. Strange I didn't have to do this with Mars or Jupiter.

Mars I think has a false lightening of the left limb caused by my post processing I think, though it has brought up more of the surface features than I could actually make out on the night.

Also, I don't have a motorised mount, a field flattener, or a fancy focuser. I did notice that the chromatic aberration got worse as the planet drifted towards the field edges, and the planet became more ovoid in the process. Maybe one of the above would help? Maybe I need to get better at post? My workflow so far is PIPP to Registax, finish in Photoshop.

Thanks for any suggestions...
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