{"id":10791,"date":"2023-08-13T18:07:58","date_gmt":"2023-08-14T01:07:58","guid":{"rendered":"https:\/\/biptunia.com\/?p=10791"},"modified":"2023-08-13T20:46:02","modified_gmt":"2023-08-14T03:46:02","slug":"my-new-astrophotograph-of-elephants-trunk-nebula-plus-unprocessed-stack-to-practice-on","status":"publish","type":"post","link":"https:\/\/biptunia.com\/?p=10791","title":{"rendered":"My new astrophotograph of Elephant’s Trunk Nebula (plus unprocessed stack to practice on, 7 hours 52 minutes integration)"},"content":{"rendered":"

\"\"<\/a><\/p>\n

Rex118da on Reddit said <\/a><\/p>\n

kudos to you! that\u2019s an amazing shot! is there any chance you can share the stacked file for practice?<\/em><\/p>\n

My life is a teaching hospital, so I see no reason not to share it. But don’t claim it as entirely your own. There’s a lot of that going on, and it’s sleazy and creepy.<\/p>\n

I didn’t want to put a big ugly watermark in the beginning, but I altered one tiny thing, so I will know if anyone shares this as their own photo without credit.<\/p>\n

DOWNLOAD UNPROCESSED STACKED IMAGE (19 megs, unzips to 149 megs)<\/a><\/p>\n

If you do process it and want to share it, please credit:<\/p>\n

“Astrophotography and stacking by Michael W. Dean \/ Intergalactic Prairie Studio, <\/strong><\/p>\n

https:\/\/biptunia.com\/?p=10791<\/a><\/strong><\/p>\n

Processing after stacking by (your name here).<\/strong><\/p>\n

Image covered BipCot NoGov License. https:\/\/bipcot.org<\/a>“<\/strong><\/p>\n

 <\/p>\n

If I get too many downloads of this, I’ll put it up as a torrent instead and change the link here.<\/p>\n

\n

My full process at bottom of post.<\/p>\n

My acquisition details are here:<\/p>\n

https:\/\/www.astrobin.com\/rh1vdv\/<\/a><\/p>\n

Also see post about possibly unnamed red area top left:
\nhttps:\/\/www.astrobin.com\/dhktpi\/<\/a><\/p>\n

Astro-Tech AT80ED 3.1″ f\/7 ED Refractor OTA, flattened to 448 mm.<\/p>\n

Sky-Watcher EQ6-R Pro.<\/p>\n

ZWO ASI2600MC Pro USB3.<\/p>\n

Bortle 2.5.<\/p>\n

Optolong L-Ultimate 2″:<\/p>\n

Shot near \/ during full moon over several nights.<\/p>\n

120mm Zwo guide scope.ASIAIR Plus, dithering by 5 pixels every 2 images.<\/p>\n

60 Flats.<\/p>\n

62 Dark Flats.<\/p>\n

89 Darks (all calibration frames shot weeks ago, but same temp within 5 degrees C on cooled camera.)<\/p>\n

Integration: 7h 52\u2032 (236\u00d7120\u2033), shot more, only used best 95 percent as per Deep Sky Stacker. Pulled stacked image into PixInsight, then Photoshop.<\/p>\n

Practice image I’m uploading is stopped right after the “Deep Sky Stacker” step. Here’s what I did next to get the image above.<\/p>\n

\n
\n
(you can skip BlurX if you don’t have it, and for StarX, if you don’t have it, you can use StarNet or StarNet2, or skip star reduction): <\/span><\/div>\n
<\/div>\n<\/div>\n
\n
Pulled stacked image into PixInsight, then: <\/span><\/div>\n
Stf Nuke with linked.<\/span><\/div>\n
Split RGB <\/span><\/div>\n
H-Alpha is red, and OIII is green. (Blue channel should be thrown away, there is no sulfur data in this image)
\n<\/span><\/div>\n
<\/div>\n
(Stf Nuke, unlinked)<\/span><\/div>\n
<\/div>\n
ChannelCombination: Use H (red) for Red. Use Ox (Green) for both Green and Blue <\/span><\/div>\n
<\/div>\n
Nuke linked. <\/span><\/div>\n
<\/div>\n
ColorCalibration (default) <\/span><\/div>\n
<\/div>\n
BackgroundNeutralization (can do default, but I grabbed sample of darkest part for reference image) <\/span><\/div>\n
<\/div>\n
SCT link Nuke.<\/span><\/div>\n
<\/div>\n
SCNRat 40 percent.
\n<\/span><\/div>\n
<\/div>\n
BlurX clone for starless <\/span><\/div>\n
<\/div>\n
StarX <\/span><\/div>\n
<\/div>\n
(then Bill’s StarReduction2 script.) <\/span><\/div>\n
<\/div>\n
Stf-histogram Stretch. <\/span><\/div>\n
<\/div>\n
NoiseX. <\/span><\/div>\n
<\/div>\n
Output 16 bit Tiff, –> Photoshop, <\/span><\/div>\n
<\/div>\n
very light finishing in CameraRaw filter. (if grayed out, flatten the Image. Might have to do that at a few steps in Photoshop)
\n<\/span><\/span><\/p>\n
<\/div>\n<\/div>\n
<\/div>\n<\/div>\n
\n
Mine is basically Dylan O’Donnell tutorial with a few beauty-steps of mine added: https:\/\/www.youtube.com\/watch?v=4NHyxmN2Yog<\/span><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Rex118da on Reddit said kudos to you! that\u2019s an amazing shot! is there any chance you can share the stacked file for practice? My life is a teaching hospital, so I see no reason not to share it. But don’t claim it as entirely your own. There’s a lot of that going on, and it’s…<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-10791","post","type-post","status-publish","format-standard","hentry","category-biptunia"],"_links":{"self":[{"href":"https:\/\/biptunia.com\/index.php?rest_route=\/wp\/v2\/posts\/10791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/biptunia.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/biptunia.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/biptunia.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/biptunia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10791"}],"version-history":[{"count":0,"href":"https:\/\/biptunia.com\/index.php?rest_route=\/wp\/v2\/posts\/10791\/revisions"}],"wp:attachment":[{"href":"https:\/\/biptunia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/biptunia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/biptunia.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}