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jjosefsen

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Everything posted by jjosefsen

  1. I love those Arp galaxies! That's a great image, thanks for sharing. I think I will have to look that one up in the ol' atlas.
  2. Captured in late August / early September. Should be viewed in full resolution. :) Gear used: AA Hypercam 1600m on a SW 80 ED Pro with matching .85 reduccer and upgraded SW focuser. Baader 7nm H-alpha and Baader 8.5nm Oiii filters. EQ6 Pro with rail upgrade. ZWO 60mm Guide scope with AA Hypercam 183m V2 camera. Software used: N.I.N.A. for planning, control and acquisition. PHD2 Guiding, Sharpcap polar alignment. Astro Pixel Processor for Calibration and stacking, PixInsight for post processing and Photoshop for watermark. Post processing workflow: Both master aligned in PI and Cropped for same FOV. Ha-master: DBE for removal of LP gradients. Deconvolution with starmarsk Linear noise reduction using various masks and TGVDenoise + MMT. Oiii-master: DBE for removal of LP gradients. Stars removed using Starnet++ and Clonestamp. Heavy noise reduction with MMT Blur with convolution Combination and non-linear: LinearFit Oiii master to Ha-master Linear combination of masters using SHO-AIP script to create RGB-master for tonemapping. Created "super lum" with 80/20 split of Ha and Oiii masters. Combination of curves and Histogram transformation for stretching both masters. Many uses of curves to get colors i like, saturation, etc on RGB-master. SCNR to remove excess green in RGB-master. LHE and Curves on super lum for better contrast. Extract luminance from RGB-master and LinearFit to super lum. Combine RGB-master with super lum using LRGB combination for a LRGB-master. A round of curves for better contrast and colors on final LRGB-master. Final round of noise reduction on LRGB-master using TGVDenoise. Save as JPG and create watermark in Photoshop.
  3. Yeah those are hot pixels.. You really need to properly calibrate your subs. If you don't use darks then you can probably get the worst hot pixels by using the cosmetic correction process before stacking. There is also a process for inspection all the frames without having to load and stf every single one, it's called blink.
  4. Amazing image, and a great wealth of information to go with it. Is there somewhere I can pixel peep at 1:1 scale?
  5. Yeah I do unfortunately. It's not a huge problem, but enough that I noticed when I was using a DSLR. But the main reason for fat stars for me is moisture due to the climate here, and my proximity to the sea.
  6. Thanks! Yes that little ED80 really does punch above its weight. Although admittedly mine has a little issue with fat stars in the red band, but going mono has helped this.
  7. I'm beginning to warm up to the idea of rotating it.. But is it the "correct" way or is it just what most people prefer? By far the most comments I have received on other media where I shared it, is that people prefer it rotated 180.
  8. Thank you, much appreciated. As this is my first real dataaset from a cooled camera, I was pretty blown away by the difference between cooled and uncooled.
  9. Thanks. I tried flipping it, but it just looked so wrong! Maybe because I've been staring at it for hours on end in this orientation while processing..
  10. This is a bicolor image of The Elephants Trunk nebula situated in the much larger star forming region of IC1396. Was captured in the late summer as the darkness started creeping back into my bright northerly skies. The star forming region of IC1396 is more than 100 lightyears across, but "the trunk" itself is around 20 lightyears long. The trunk is a column of dust and hydrogen gas which is beautifully backlit by the pale blues of an oxygen gas cloud. Combined exposure of 8.5 hours. 4,5 hours of Hydrogen alpha. 4 hours of Oxygen III. Captured with N.I.N.A, stacked in Astro Pixel Processor, and processed with PixInsight. For the full version (worth a look in my humble opinion) and more details about gear and settings, goto astrobin here: https://www.astrobin.com/full/0rcqpa/B/?real=&mod= Critique, comments and questions are more than welcome!
  11. Sure.. I got these. https://www.astroshop.eu/guide-scope-rings/astoptics-cnc-guidescope-ring-90mm-vixen-clamp/p,57812
  12. Problem solved! It was due to stacking artifacts introduced by APP. When those were resolved, the normalization issues were gone. :)
  13. No - but I suppose I can do that somehow as a batch process. It is just strange that it doesn't happen in my Ha stack as well.
  14. Hi, I'm working with some recent data of a new(ish) camera, and my Ha data is pretty good, but the oiii has these strange artifacts around the borders. If I use any kind of local normalization then it pretty much ruins most of the image, as you can see below.. First the Ha: Oiii with local normalization: oiii local normalization map, see how it fits with the artifacts: Oiii without any local normalization: These edge artifacts, could they be related to a bad filter or is it a processing artifact, has anyone seen anything similar? I am using Astro Pixel Processor for calibration and stacking.. Im kind of stumped on this one, and I am going to yank out the Oiii filter this weekend to have a looksie.
  15. There is a bahtinov tool yes. Single frames can be captured in the imaging tab. You can plan mosaics in the framing tab.
  16. The rest is somewhere on youtube, gain, offset, etc. Here:
  17. This is great, well done and thanks for sharung.
  18. How is Grant comming along with this scope? It looks like it is made by GSO, so I assume it has the same crayford focuser as the other GSO 6" RC's out there?
  19. Hi Rob, Happy N.I.N.A. user here.. Have you had a look at the documentation here? https://nighttime-imaging.eu/docs/documentation/tabs/ I know a fella named David Harvey has made some videos about N.I.N.A., but I cannot for the life of me find them again.. Edit: Found it! Mitch Arsenault a.k.a. Astro Dude is also comming out with a video soon, so you could have an eye on his youtube page for the video. There is also the dedicated Discord server, where a bunch of users and contributors hang out, you should be able to get help there as well. Hope you get on with it.
  20. Seeing as this is a new product and possibly driver, could you try to check it with the ascom conformity checker.. https://ascom-standards.org/Developer/Conformance.htm It is suprising how many suppliers mess up the drivers..
  21. The resolution will always be better in mono. But I must say that I am quite impressed with the results that @StaceStar has been getting with her filter. If I hadn't already gone down the mono route, I think I might have gone down this particular rabbit hole too.
  22. The Needle in RGB A beautiful edge on spiral galaxy in the constellation Coma Berenices, around 38,5 million LY from earth. Investigations with the Spitzer IR telescope suggests that the galaxy may actually be a barred spiral galaxy with an inner ring as well. -------- Finally got around to processing my data on NGC 4565 from March. This was one of my "test projects" from this year, where I only shot R-G-B and created a synthetic luminance master from those frames. I think that the most efficient way is still to shoot pure luminance and then just enough R-G-B to get the color you want. Unless one is imaging star clusters, then I think it is totally fine to skip luminance altogether and get as much color data as possible. I will try to do a "super luminance" where I add the R-G-B frames to the luminance stack at some point as well. Shot with my Hypercam 183m V2 and totalling aroung 4,2 hours of data. More info here: https://www.astrobin.com/412663/B/ Comments and critique is always welcome. I decided to put this post in "Getting started with imaging" as it may be interresting for beginners thinking if luminance is worth it.
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