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Laurin Dave

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Everything posted by Laurin Dave

  1. I use Pixinsight Star Alignment with Thin Plate Splines and Distortion Correction, you might need to increase "Ransac tolerance" and tick "use scale differences" in the Star Matching box
  2. Hi Adam.. I process the RGB and Lum separately then combine both using either the LRGB script in Pi or else in Photoshop by pasting the lum on the RGB setting blend mode to luminance, opacity to 20%.. increase saturation slightly in the RGB, Gaussian blur of 0.6 on the RGB then flatten .. repeat 5 times.. may not need to increase saturation in the later stages.. Dave
  3. Here's my entry, processed in Pixinsight and Photoshop. STF stretches, then Starnett on each of S, H and O, into Photoshop to deal with Starnett artefacts, combined as SHO in Pixinsight, combined Starry Ha as Lum using Pixinsight LRGB, selective colour in Photoshop, a bit of star reduction, Local Histogram Equalisation, sharpening, noise reduction, rotate and crop. Dave
  4. Hi Dave, I ran it though Pixinsight as follows: - register, crop, RGB channel combine, Dynamic Background Extraction on both , Photometric colour calibration, ArcSinh stretch on RGB, Histogram Stretch on RGB then colour boost in Photoshop using LabColour, HS on Lum and then LRGB combo... came out looking like this... Galaxy and star colours look ok to me. I'd suspect that its your colour calibration that's gone astray although as I'm not familiar with AstroArt I can't suggest how to fix it. The light streaks are puzzling as the nearest star in the direction they are coming from is HD214667 which is mag 9, Eta Pegasus could be the culprit at mag 3 but it is a long way off. I'd check that they are on all your subs and if not would suspect something closer to home. Focus quality also looks a bit soft and different between filters with green best and blue, I'd measure all your subs to see what's going on with focus. HTH Dave
  5. Here's your new RGB with your Lum from last years mosaic.. (i found this years was too stretched to combine) If it were me I'd get the spacing sorted and keep the camera... Dave
  6. So Steve, the question now is what does the Lum only look like ?
  7. Hi Steve.. I think your last one’s the best, background maybe looks a bit green on my screen, but very good, well done Dave
  8. That’s worked rather well Steve. Next step is to combine your other data with it . Dave
  9. All very nice Steve, I had a very similar experience and similar results when I did this last year. As Vlaiv says definitely more nebulosity in the HaRGB version but that one loses the lovely pinks of the RGB.. needs some Oiii I guess to bring them back.
  10. Hi Olly I've tried it in Photoshop and it works on images from my ASI2600mc on my i7 machine, faster than Starnett in Pi... as others have said it does leaves very smooth patches where the star has been removed.. Were you aware that you can get a months free trial? Dave
  11. Nice one Steve... the 4 small spikes at 90 deg are from the KAF8300 camera. I get them with my KAF16200 although the other night I had multiple spikes as a spider had weaved a web across the dew shield
  12. Started back in late April and finished off early last week, the Tulip Nebula in Cygnus, accompanied by what is believed to be the shock wave from micro-quasar Cygnus X-1 in HaLum_HaR_OiiiG_OiiiB and SHO palettes. 10 hrs each Ha, Oiii and Sii and 3hrs each RGB, RGB and Ha captured with Esprit150/SX46 and Sii and Oiii captured with Esprit100/ASI1600mm. Processed in Pixinsight and Photoshop, Ha and Oiii added using blend mode lighten and Ha used as a light lum layer again using Photoshop. Thanks for looking Dave
  13. If I remember correctly back focus should be 44mm for a Canon fit 46.5 mm for a Nikon fit plus 1/3rd of any filter thickness you have between the lens and the sensor
  14. Did you use “fast” or “high quality” as the option in Mosaic by Coordinates? If the former then try the later.. and do it overnight as it’ll take a while also do the Ha, Oiii and Sii for each individual panel align correctly? If not then I suggest you register the subs using thin plate splines and distortion correction ..
  15. Looks like amp glow to me ... see this from ZWO What is Amp-glow and how do I manage it? | ZWO ASI (astronomy-imaging-camera.com)
  16. Here's my second go.. this time with enhanced IFN. I did this using a masked curve. The mask for the IFN was created using Pixinsight's MLTransform (which isolated the large IFN structures) and Starnet (which removed the star residuals), the galaxies were protected using masks generated with PI's GAME script (which allows you to draw ovals). Dave
  17. Here's my first go...... processed in Pixinsight and Photoshop. Background extraction and neutralisation, Photometric colour calibration, HSVrepair, ArcSinh and Histogram stretches on RGB, Deconvolution and Histogram stretch on Lum, Histogram stretch on Ha - all in PI, LAB col and Soft light saturation increase in PS, Ha added to Red using Blend mode lighten in PS, Luminance layered on in 5 iterations in PS, Local Histogram equalisation in PI then LHE and non LHE images combined in PS to enhance (although not by very much) the IFN, MLT sharpening in Pi and a slight curve lift in PS ...... and a lot of toing and froing Dave edited 18Aug - improved detail on Holmberg
  18. Very nice Alan.. I agree, the NSG script is great, as you say it makes gradient removal easier and also helps brings out faint details..
  19. He was busy on Instagram earlier today showing off his polishing skills ..
  20. Very nice Steve, lovely detail into the core
  21. Lovely images, particularly like the Trifid.. which must be very low Dave
  22. I run a SX Ultrastar and DeepSkyDad autofocuser through the hub on my ASI2600mc with no issues... from there to the desktop pc though an active USB3 HTH Dave
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