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Jupiter 16-6-16 first attempt with C6

PostPosted: Sun Apr 17, 2016 5:43 pm
by carastro
Well this isn't going to win any prizes, but I thought I'd post it up for advice in the future.

My first attempt with this new scope, and for the first time ever whilst planetary imaging I managed to split the Moons with a Bahtinov mask to get focus, but despite that I still struggle to get a decent image.

Image

I took quite a few AVIs, but so far this seems to have come out the best of a bad bunch.
All help and advice welcome.

DBK2104 556 frames 30fps,
Resolution=640x480
Frame Rate (fps)=30.00
Colour Space=YUY2
Exposure=-4
Brightness=0
Hue=157
Saturation=103
Gamma=97
Gain=556
Stacked in Autostakkert and wavelets in Registax, post-processing in Photoshop mainly Smart Sharp and colour adjustment.

I followed the same processing tutorial that I used last month, but ended up with horrible rings during the wavelets procedure so had to change that.

I suppose I have made some sort of progress - but still a long way to go. Planetary imaging is so much more difficult than DS imaging.

Image

Carole

Re: Jupiter 16-6-16 first attempt with C6

PostPosted: Mon Apr 18, 2016 3:50 am
by patthehorse
The colour looks spot on. I'd put this one down to the conditions Carole. Did the stacks look ok after AS2. If so be gentle on the wavelets if the seeing is bad. The S@N has just done a Winjupos tutorial the last two months if it's a rotational thing.

Re: Jupiter 16-6-16 first attempt with C6

PostPosted: Mon Apr 18, 2016 8:17 am
by carastro
Thanks Patt, I don't think it was a rotational thing as it was only 1 AVI of 30 fps and only 556 frames and some-one else in the area imaged Jupiter the same night and got an OK image and his was OK. It was in focus (as tested on the Moons). But just can't seem to get any detail out of the files without over stretching.

Carole

Re: Jupiter 16-6-16 first attempt with C6

PostPosted: Tue Apr 19, 2016 6:13 pm
by lizard
Hi Carole,

yes pretty poor that :( I always work on the opinion of what you see is what you get whilst recording, good advice from Dion. Also I stick to no longer than 2 mins to minimise rotational errors, although saying that I am going to go for 5 min ones tonight and correct rotational error using WinJupos.

Just in case it is your registax settings, see the attached that I use which appear to work for myself.
I also spend time cycling through all of the frames in registax to get the lollypop sticks as small as possible, usually not happy until there are no lollypop sticks visible :geek: then I always do an RGB align first, and for my Aggressive Wavelets I usually put 1 & 2 at max and do fine adjustments on the remainder, see what you think and I hope you have some positive results.

regards, Steve.

registax.pdf

Re: Jupiter 16-6-16 first attempt with C6

PostPosted: Tue Apr 19, 2016 7:39 pm
by carastro
I am pretty convinced it was out of focus, even though I used a Bahtinov mask.

It is a new (to me) SCT first light, I have never owned an SCT before, so I am going to look at the collimation tonight. If that is out I presume it could be part of the explanation.

Thanks for the Registax links, I actually used Autstakkert for stacking and Registax wavelets.

what you see is what you get whilst recording

Not quite sure about that because the image I did back in March,(on another thread), didn't look much better when i was capturing it.

Carole

Re: Jupiter 16-6-16 first attempt with C6

PostPosted: Tue Apr 19, 2016 8:11 pm
by lizard
carastro wrote:I am pretty convinced it was out of focus, even though I used a Bahtinov mask.

It is a new (to me) SCT first light, I have never owned an SCT before, so I am going to look at the collimation tonight. If that is out I presume it could be part of the explanation.

Thanks for the Registax links, I actually used Autstakkert for stacking and Registax wavelets.

what you see is what you get whilst recording

Not quite sure about that because the image I did back in March,(on another thread), didn't look much better when i was capturing it.

Carole

Hi Carole, yes you could well be correct on the coll, your moons do look a bit blobby to the right which tends toward slightly out of coll, I have never used Autstakkert so can not comment on it's performance, just to experiment it maybe worth running the same AVI through Registax to see how the results compare.

Good luck tonight, forecast clear until the early hours, I'll be having another go at Jupiter myself, pity the GRS will not be visible :crying:

Re: Jupiter 16-6-16 first attempt with C6

PostPosted: Wed Apr 20, 2016 1:47 am
by carastro
it maybe worth running the same AVI through Registax to see how the results compare.

I've already done that Steve. I have given up on those captures now and chucked them away as they are big files.

Collimation wasn't too bad I did it tonight and it was only a smidge out.

Image

I tried Jupiter again this evening, but the AVIs were so dim on first stacking attempt I don't think they are going to produce anything. I read earlier that the capture should be dim, I just can't seem to get the capture settings right, and focus was still a bit out even having used the Bahtinov mask (as proven by the Moon images I did at the same time.

I don't think I am much good with planetary, I got a good one back in March, but just can't seem to repeat it.

Give me DS imaging any day you don't have to fiddle with the controls, you just find the target, set the length of exposures and Bob's your Uncle.

Carole

Re: Jupiter 16-6-16 first attempt with C6

PostPosted: Wed May 04, 2016 10:32 pm
by n3umw
I've read that using a mask might not be a good idea for planetary work as focus could shift when the planet is realigned. I usually just play with the gain and the focus until I think it's good and take a couple of three minute videos. Then refocus and a couple of more videos, etc, etc. I figure the focus must be good sometime.

Re: Jupiter 16-6-16 first attempt with C6

PostPosted: Thu May 05, 2016 8:27 am
by rabbitde22
Hi Carole.
Colimation looks about spot on in the pic above, I take it your using high power when doing it- 2.5 - 3x barlow is needed!
Forget the B mask Carole, its a good dso aid but not for planetary work! You will have to keep tweaking the focus through out your imaging session, as focus is always shifting due to atmospherics which have less effect on dso imaging as it does planetary!
As a rule its a good idea to stand about a metre away from your screen when achieving good focus as its easier to see the detail coming & going, the ( transparency)!
Keep to about 2 - 2.5 mins runs, no need for WJ derotation its not needed & will only complicate your learning curve, I only use it now & again myself its not the most user friendly software either!
30 fps captures will give you about around 3500 frames to stack, use AS!2 not R6, its easier faster & will correct very slight de-rotation, just about every planetary imager now uses this for Stacking! You can then load the stacked tiff into R6 for wavelets auto- align colour balance etc!
Hope this helps Carole!
Regards Simon!

Re: Jupiter 16-6-16 first attempt with C6

PostPosted: Thu May 05, 2016 9:38 am
by carastro
Thanks Simon,

Well as a VERY SUCCESSFUL Jupiter imager, I value you feedback.

I have had another session since this image and everything was utter rubbish at the end of it, getting very despondent with planetary imaging.
I am using a 2 x barlow and find focus a really difficult thing to do. I used AS for stacking previously but the last couple of times I seem to get a black box obscuring about 1/4 of the image, and I am not sure what is going wrong - I checked all my settings, so I ended up having to use Registax - ANY IDEAS WHAT IS CAUSING THIS BLACK BOX?

Well I suppose the seeing could have been awful this last session, so only thing I can do is keep trying I guess.

Carole