{"id":2011,"date":"2023-01-14T22:38:09","date_gmt":"2023-01-15T05:38:09","guid":{"rendered":"https:\/\/michaelwdean.com\/?p=2011"},"modified":"2023-01-14T22:38:09","modified_gmt":"2023-01-15T05:38:09","slug":"my-photo-of-andromeda-galaxy-two-scopes-done-with-dslr","status":"publish","type":"post","link":"https:\/\/michaelwdean.com\/?p=2011","title":{"rendered":"My photo of Andromeda Galaxy, two scopes, done with DSLR"},"content":{"rendered":"

\"\"<\/a># ACQUISITION AND PROCESSING DETAILS:<\/p>\n

My latest #astrophotography photo. M31, plus of course, M32 and M110. I’m BipTunia on AstroBin if you want to add me or write to confirm I took this.<\/p>\n

Taken with two scopes, total of 6 hours 39 minutes integration. Bortle 2.8, rural, north east Oregon farm.<\/p>\n

This photo was done OSC (one-shot color), no filters, natural color. Did no Star Reduction. Tried it but liked it better without.<\/p>\n

I use an IR modified DSLR, a Canon 90D, RedCat 51 telescope (250 mm), and Astro-Tech AT80ED (488 mm when adjusted for field flattener.) Sky-Watcher EQ6-R Pro mount. Guiding scope: ZWO 30mm Mini Guider Scope.<\/p>\n

Guiding Camera: ZWO ASI120MM Mini. SharpCap on laptop for polar align and plate solving live. Used Phd2 on laptop for guiding.<\/p>\n

All 60-second exposures, 800 ISO. Shot these this summer, previously output as two different images.<\/p>\n

Went through images manually to remove any that had odd framing, were blurry (usually at the start of session before tracking gets good), or there was a cloud or airplane. Deleted any of those. I know it can be done automatically in DSS or in PixInsight, but I”m new enough to get a kick out of seeing each image and doing it myself.)<\/p>\n

Stacked each scope set in DSS. Brought in lights, darks, flats, and dark flats I took during the session. Used defaults from there.<\/p>\n

It’s been cloudy now for over a month where I live so I decided to reprocess and combine both scopes’ shots.<\/p>\n

Brought output TIFF from each scope into PixInsight. Registered together in StarAlingment using one as reference for both.<\/p>\n

Staked in ImageIntegration. First made copy of each since least you can stack is 3 images. Got one combined stacked Tiff, took into:<\/p>\n

–AutoBackgroundExtractor. Target Image Correction (on bottom), Correction: set to DIVISION<\/p>\n

Drag triangle onto image.<\/p>\n

Delete ABE Background and Original file. Work now on (filename)_ABE<\/p>\n

close AutoBackgroundExtractor.<\/p>\n

–On ScreenTransferFunction, hit “Nuke” symbol<\/p>\n

–Used RangeSelect \/ HDR MultiscaleTransform to bring out details while protecting core of M31 and M110 from being blown out.<\/p>\n

–Applied BlurXterminator, with defaults.<\/p>\n

–ColorCalibration \/ ColorCalibration. Hit little “document” icon (with nothing inside) at top below “workspace”.<\/p>\n

Pick darkest small area of image, make a box.<\/p>\n

On ColorCalibration, go down to BackGround Reference.<\/p>\n

Click box to right of drop down area. Pick Preview01. Hit OK.<\/p>\n

Change BackGround Reference Upper Limit to: 0.0050000<\/p>\n

Drag triangle onto image.<\/p>\n

close ColorCalibration.<\/p>\n

============<\/p>\n

ScreenTransferFunction: LINK LINK LINK and Nuke.<\/p>\n

=====<\/p>\n

SCNR. Drag triangle onto image. (set to green) close SCNR. or skip if you want to leave some green.<\/p>\n

–(still open): ScreenTransferFunction. Stay linked. Hit + Click on color bar to Zoom a few times. Click Arrow. Hit arrow left \/ top right, then Slide to change Background color.<\/p>\n

–HistogramTransformation<\/p>\n

Drag ScreenTransferFunction triangle onto HistogramTransformation bottom of gray bar at bottom of entire window.<\/p>\n

–Drag HistogramTransformation triangle to image. Image turns white.<\/p>\n

–ScreenTransferFunction reset. Bottom values should now be higher.<\/p>\n

–Applied NoiseXterminator with defaults.<\/p>\n

OUTPUT UNCOMPRESSED TIFF, pick 16 bit, the default is always 32 bit.
\nBring into Photoshop, increase contrast, brightness, and saturation a tiny bit on whole image.<\/p>\n

Did cropping to remove some space where not a lot was happening, to make M31 take up more of image.<\/p>\n","protected":false},"excerpt":{"rendered":"

# ACQUISITION AND PROCESSING DETAILS: My latest #astrophotography photo. M31, plus of course, M32 and M110. I’m BipTunia on AstroBin if you want to add me or write to confirm I took this. Taken with two scopes, total of 6 hours 39 minutes integration. Bortle 2.8, rural, north east Oregon farm. This photo was done … Continue reading “My photo of Andromeda Galaxy, two scopes, done with DSLR”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[245],"tags":[],"class_list":["post-2011","post","type-post","status-publish","format-standard","hentry","category-mdad"],"_links":{"self":[{"href":"https:\/\/michaelwdean.com\/index.php?rest_route=\/wp\/v2\/posts\/2011","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/michaelwdean.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/michaelwdean.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/michaelwdean.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/michaelwdean.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2011"}],"version-history":[{"count":0,"href":"https:\/\/michaelwdean.com\/index.php?rest_route=\/wp\/v2\/posts\/2011\/revisions"}],"wp:attachment":[{"href":"https:\/\/michaelwdean.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/michaelwdean.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/michaelwdean.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}