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Old 18-06-2021, 05:06 PM
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multiweb (Marc)
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Carina widefield Duo band

This is a 7 panel mosaic I shot in January, end of March and early April with the FSQ106N/QHY9 and a zwo duoband filter. 35x300s for the center and about 20x600s each for the periphery. Seeing was ok for most of them but the bottom center and illumination difference with moon and others over the period it was captured so no perfect seams.

Obviously had to flatten the dynamic range a little over the whole field so the center is not too blown out while still showing outer field nebulosity.

I've added two little insets that might be planetary nebs which I haven't chased up yet to identify. See if you can find them in the 1:1 mosaic.

1:1 [7588x6490 - 24.7MB]
50% [3794x3245 - 8.4MB]
HD [1920x1642 - 2.3MB]

Enjoy the views.
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Old 18-06-2021, 06:17 PM
Alchemy (Clive)
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You mentioned the moon, what effect does this have on the dual band filter ?

I can’t see any seams on the 50% version
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Old 18-06-2021, 06:28 PM
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multiweb (Marc)
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Quote:
Originally Posted by Alchemy View Post
You mentioned the moon, what effect does this have on the dual band filter ?

I can’t see any seams on the 50% version
It does affect the Oiii channel. Depending on transparency and humidity the sky tends to light up as well here because of LP so you quickly get gradients based on altitude. I guess I know where the seams are so I can't unsee them.
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Old 18-06-2021, 06:59 PM
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Superb Mosaic Marc - It's a real revelation: as if I can see/notice new things in the nebula .... Well Done

Best
JA
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Old 18-06-2021, 09:46 PM
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Ryderscope (Rodney)
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A top project Mark with a good result making the effort worthwhile.
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Old 18-06-2021, 10:09 PM
Dave882 (David)
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Great work! Very enjoyable scanning through the full res version. So much detail to take in. Didn’t even notice the seams tbh
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Old 19-06-2021, 06:14 AM
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Great work Marc, the heat and humidity up here at higher latitudes does have an affect..
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Old 19-06-2021, 12:03 PM
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Quote:
Originally Posted by JA View Post
Superb Mosaic Marc - It's a real revelation: as if I can see/notice new things in the nebula .... Well Done

Best
JA
Thanks JA. Yeah mosaics with a bit of resolution are great to pan around.

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Originally Posted by Ryderscope View Post
A top project Mark with a good result making the effort worthwhile.
Thanks Rodney.

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Originally Posted by Dave882 View Post
Great work! Very enjoyable scanning through the full res version. So much detail to take in. Didn’t even notice the seams tbh
Thanks Dave. There are a few issues and one panel that I wanted to reshoot completely but other things got in the way and I haven't had the time.

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Great work Marc, the heat and humidity up here at higher latitudes does have an affect..
Thanks mate. Not so much humidity here by LP latches on anything that affects transparency.
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Old 19-06-2021, 12:15 PM
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If you use astropixel processor you can eliminate those seams using LNC x2 or 3, you can tune it to see, worked well for my Dragon shot where I used 2 different focal lengths. From 2 different nights.
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Old 19-06-2021, 12:37 PM
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If you use astropixel processor you can eliminate those seams using LNC x2 or 3, you can tune it to see, worked well for my Dragon shot where I used 2 different focal lengths. From 2 different nights.
The main issue is that I minimised the overlap by deleting parts of the bad panel to force the autoblend in PS on using the good ones. The result is a marked boundary because of the difference in noise and brightness/contrast. I'm not familiar with APP but will give it a go.
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Old 19-06-2021, 01:26 PM
matlud (Mathew)
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Very nice mosaic Marc, lots of nice detail 👍
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Old 22-06-2021, 11:43 AM
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Very nice mosaic Marc, lots of nice detail 👍
Thanks Mathew.
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Old 23-06-2021, 02:03 PM
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Great detail in the high-res and some nice, wispy extensions.
Didn't have the patience to track down the suspected PNs though!
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Old 29-06-2021, 12:39 PM
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Great detail in the high-res and some nice, wispy extensions.
Didn't have the patience to track down the suspected PNs though!
Thanks Pete. Tried to plate solve with unimap but no luck so far.
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Old 29-06-2021, 03:59 PM
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A great expansive view there Marc with some wonderful sharpness.

Its good to see the whole of Eta in one image.

Greg.
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Old 01-07-2021, 03:27 PM
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rustigsmed (Russell)
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excellent work marc - love the 1:1 version - great star shapes and excellent detail.

cheers
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