Author Topic: M34  (Read 246 times)

Longjohn54

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M34
« on: August 31, 2018, 08:40:34 PM »
Thought it was about time I took some pictures...
M34 taken on 30 and 31 Aug.   15 x 300s of RGB giving 3.75 hours of data.  Processed in Dawn which took less than a minute using the defaults.  Then adjusted the colour balance and levels a bit.
Would anyone like the subs to see what proper processing can achieve?
John

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SpookyKatt

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Re: M34
« Reply #1 on: September 01, 2018, 06:59:56 PM »
hi john, good to hear from you and great your taking images. Did
you get your observatory completed ?


Yeah sure post a link, it
will be good practise.


Kathleen
HEQ5/EQ5
Tal 200K and Tal 100R
Equinox 80 and Orion 80
Skywatcher 150mm Refractor
Modded Canon EOS 400D
DFK-31AF03

Longjohn54

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Re: M34
« Reply #2 on: September 02, 2018, 02:19:20 PM »
Hi Kathleen,  I've sent a link via a message.
The obsy has been in use for over a year now and I love it.  So much better than setting up and taking down in the garden each time there's a clear night.   :D
John

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Longjohn54

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Re: M34
« Reply #3 on: September 28, 2018, 04:25:42 PM »
I've downloaded a trial version of Pixinsight and had a go at reprocessing my subs.   I've been following the practice used by Kayron Mercieca in his blog - http://www.lightvortexastronomy.com/  His tutorials on Pixinsight coupled with Harry Page's Videos - https://pixinsight.com/forum/index.php?topic=1167.0 are pretty amazing and without them I'd have been lost.
To get a better image I clearly needed more calibration subs. So, after making 200 Bios at 0.001s plus 20 darks at 300s plus 20 Flats of each R,G and B at 0.002s, I could now start reprocessing.  With cleaner subs I could get a better stretch and bring out a lot more stars and better colour.  Somehow this version is swapped 180 degrees left to right.   I wonder how and when that happened.  Life's little mysteries!
John

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perthskies

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Re: M34
« Reply #4 on: September 29, 2018, 09:54:29 AM »
Very nice John. Re the obsy, this is why I gave up on the imaging and went to visual. I was fed up setting up and taking down on my small back garden with a limited view of the sky. I envy you and all others who have an observatory and a wide expanse to photograph.


Best wishes
David
12" Goto Dob - wee grab 'n go refractor
Gloves - silly hat 3 pairs of binos and nae sense.

SpookyKatt

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Re: M34
« Reply #5 on: September 29, 2018, 01:34:42 PM »
Nice John, yeah the resulting image is much improved I have to say.  Sorry I never got near having
a go at processing your subs yet.  Its a sad statement re the weather though that I have none of
my own to process.
HEQ5/EQ5
Tal 200K and Tal 100R
Equinox 80 and Orion 80
Skywatcher 150mm Refractor
Modded Canon EOS 400D
DFK-31AF03

Longjohn54

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Re: M34
« Reply #6 on: October 09, 2018, 04:57:05 PM »
After learning a bit more about PixInsight and reprocessing several times I think I'm done ( for now  ;D ).
There's a much better colour balance and the stars are not washed out.

Hosted on AstroBin now as the jpg is nearly 4Mb in size.  In PixInsight it is 61Mb.   :)

https://astrob.in/370851/0/

John

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blinky

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Re: M34
« Reply #7 on: October 23, 2018, 09:55:34 PM »
Very nice - for colour balance did you use the Astrometric colour balance?  Itís so easy and really really good!
Would be happy to play with your data but Iím in New Orleans with work at the moment

Longjohn54

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Re: M34
« Reply #8 on: October 30, 2018, 04:34:24 PM »
Very nice - for colour balance did you use the Astrometric colour balance?  Itís so easy and really really good!
Would be happy to play with your data but Iím in New Orleans with work at the moment
I haven't tried Astrometric colour balance yet, I'll add that to my list of things to do.
I'm currently processing M103 and M76 and am finding a few problems controlling the star colour.  Stars have a colour cast (it's the same on M34 too).  I first thought it was misalignment of subs but stacking in DSS or PI gives the same result.   Anyway the star centres are spot on so it seems to be a processing problem.  Here's an example blue star.

Hope the trip to New Orleans was not all work and you had time to go sight seeing.



« Last Edit: October 30, 2018, 04:37:08 PM by Longjohn54 »
John

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