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Old 26-09-2019, 08:35 AM
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50 pane mosaic - MCs to Pointers to Carina

Whilst visiting family in NZ last week I got the chance to spend a few hours doing a dark sky astrophotography session with my brother near the base of Mt Hutt ski-field. One of the goals was to create a 7x7 high resolution mosaic of the region from the SMC to LMC to Carina to the Pointers, something I haven't been able to do around my home region of northern NSW do to its high latitude. (I havent worked out how the 50th image snuck in there)
I used a Canon 6D with a 135mm Samyang F2 at F2.4 with a panoramic ballhead on top of my Star Adventurer EQ mount.
AstroPixel Processor did an incredible job of blending the 50 images in one run, but I had awful blending lines due to vignetting.
So I put the camera and lens in the fridge yesterday for a while (which I figured was a good approximation to the 5 degrees we were photographing in) and took a full set of calibration frames then reprocessed. The flats in particular helped immensely and I just needed a bit of help from APP's light pollution removal tool to tidy the blending lines up a bit.

Can anyone suggest a good place to host the full sized version ?

(Footnote: I managed to create myself an Astrobin profile and made this my first image)

https://www.astrobin.com/full/xffh6e/0/?nc=user
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Last edited by CalvinKlein; 26-09-2019 at 12:46 PM.
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Old 26-09-2019, 09:49 AM
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Great job Kelvin

Mike
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Old 26-09-2019, 12:36 PM
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Nicely done Kelvin. Try Gigapan for hosting the large size file. It has a minimum image size of fifty mega pixels.
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Old 26-09-2019, 12:49 PM
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Nicely done Kelvin. Try Gigapan for hosting the large size file. It has a minimum image size of fifty mega pixels.
Thanks Rodney - I'll give that a go. This one comes in at 52 mega pixels so just makes the grade. I just made it my first Astrobin image - link is in original post.


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Great job Kelvin

Mike
Thanks very much Mike
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Old 26-09-2019, 01:53 PM
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Certainly a large mosaic that has come together really well Congratulations Kelvin
It’s come out relatively clean, how much integration did you have per panel?
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Old 26-09-2019, 02:22 PM
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Certainly a large mosaic that has come together really well Congratulations Kelvin
It’s come out relatively clean, how much integration did you have per panel?
Thanks very much Colin - you inspired me to have a go at it. Its only a 10 second single image per panel. I didnt have enough time to get any more as the Milky Way was rapidly setting over the snow-capped mountains which was my second imaging target.
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Old 26-09-2019, 04:38 PM
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For only 10s images it’s come out really clean!
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Old 26-09-2019, 08:26 PM
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That link does not work for me.

Greg.
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Old 27-09-2019, 08:37 AM
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For only 10s images it’s come out really clean!
I was very surprised how well it turned out for only about 25 minutes total imaging ! (10 sec image / 15 sec move to next position). It did need the flats however and the flats needed bias (a tip I read on APP forum to prevent "over-flattening"). Oh and APP took about 7 hours to do the calibration and mosaic processing !

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That link does not work for me.

Greg.
Astrobin seemed to have issues yesterday greg - I had "502 bad gateway" errors around the time I was posting this and creating my profile.
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Old 29-09-2019, 01:13 PM
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A very nice mosaic Kelvin
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Old 30-09-2019, 06:13 AM
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A very nice mosaic Kelvin
Thank you very much Suavi
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Old 30-09-2019, 01:57 PM
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That link worked now.

You could up the curves on the Milky Way arm. LMC and SMC are quite bright but the MWay is dim. Also a slight pinkish colour bias on my monitor.

But 50 pane mosaic is worth some serious processing redos if needed. I'd say there is a lot in that MWay arm that can be coaxed out.

Greg.
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Old 30-09-2019, 06:41 PM
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Very nice, Kelvin! Pretty amazing for only 1x10s sub per panel Colour looks different between IIS and Astrobin? The latter look a touch too green to my eye.
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