Saturn - 8 April 2011

[bones]

I still see myself as pretty much a newby to imaging and processing, but anyway... Friday night conditions seemed the best in a long long time so I set up and had a go again.
CPC11, DMK21AU, IC capture 2.2, luminescent filter, 2xbarlow.
800 frames out of approx 2700 stacked in Registax 5. Yes it mono.
Tony

[Troy]

You have captured some fine detail in this picture. Well done :thumbsup:

[Quark]

Hi Tony, looks like conditions were good, CD & rings seem crisp.

The ghost on the right hand limb of the planet and extremity of the ring ansae is interesting. Asi has a C-11 so maybe he could advise on the possible cause of it, initially when I saw it I thought it maybe due to collimation but the rest of the image seems unaffected.

Good work.
Regards
Trevor

[bones]

Thanks Troy & Trevor.

Trevor, not sure about the 'ghosting' myself. I initially thought it might have been focussing, but as you said the CD and rings seem crisp. Maybe I might have some clear but distorted frames in the stack?

I processed it again but this time with 1500 frames. A little clearer but still getting the 'ghosting' affect. I've attached the reprocessed image to this reply.

Tony

[firstlight]

Nice work Tony. If you were imaging in colour, I would have guessed that it might have been one of the channels out of alignment.

[asimov]

Nice work Tony. Yes I believe the ghosting is a slight miscollimation. Might pay to check this on a good night. It also could be sag from something in the imaging train like a barlow etc. Best way I've found is to collimate on a star at the FR you are going to be working at with the cam.

The images look skewed diagonally as well for some reason.

[Shiraz]

Nice detail Tony. Agree with John that collimation may be an issue, particularly imaging train sag. slight skewing could also be from this source. regards Ray