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skyrunner

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About skyrunner

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    Nebula

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    Cambridge
  1. Thanks for supplying the data. Here's my go at processing it in Pixinsight: Hope you like it! Gordon Televue-85, WO RedCat 51, LX200 10"; HEQ5-Pro, Star Adventurer Pro; ZWO ASI183MM Pro, Canon Rebel T3i Astro modded; Pixinsight, SG Pro, Affinity Photo, PHD2
  2. £1.99 at Amazon https://www.amazon.co.uk/gp/product/B00X8FAZWC/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&th=1
  3. Lovely data, great to have such low noise O3 & S2 as starting points. Processed in Pixinsight throughout. Luminance processing: - Max(Ha, S2, O3) -> Lum - Deconvolution to sharpen stars - TGV denoise with Luminance mask to reduce background noise - Histogram stretch (multiple) - MMT to shrink stars - Starnet to create starless_lum image - Blend 70% lum with 30% starless_lum - Sharpen with Local Histogram Equalisation & MMT using starless_lum as nebula mask Colour processing: - LinearFit O3, S2 to Ha - RGB Combine (Ha, 5%Ha+25%S2+70%O3,O3) [Combinations evaluated using SHO-AIP script] - BackgroundNeutralisation - Histogram stretch (multiple) - Curves transform - LRGB Combination of lum and colour - Curves transformation - Remove yellow halos on big stars with colour mask I am also posting the starless monochrome image - I was blown away when I saw it and think it makes a great image on its own. Gordon Televue-85, WO RedCat 51, LX200 10" HEQ5-Pro, Star Adventurer Pro ZWO ASI183MM Pro, Canon Rebel T3i Astro modded Pixinsight, SG Pro, Affinity Photo, PHD2
  4. Interesting talk. I mainly use PI for processing so I was comfortable with the tool. But I've just picked up on the StarNet module in the last few days so it was great to see how Dave uses it for creating masks. I was also interested to see how he uses a lot of Unsharp Masking and SCNR in his processing workflow. Gordon
  5. So another unusual phenomena last night. Imaging the Rosette Nebula in Ha my images appear covered in lots of 'dust bunny' type defects. But after I switched target to the Fishhead Nebula in a different part of the sky those images appear fine - see side by side images from same area of sensor after calibration and stacking. Also taking some flats this morning they all appear clean. The only thing I can think of is that the Rosette was quite close to the moon, probably about 20 degrees away. Perhaps this is also the microlensing phenomenon as a result of the high level of sky brightness close to the moon? Gordon
  6. Thanks, Carole, I've not heard of this before - I'll have a search and see what I can find. Gordon
  7. I was imaging the Jellyfish nebula in Ha with my WO Megrez 72 refractor a few evenings ago and after stacking found this strange diffraction pattern around the very bright star in the frame. I've never seen this before in any of my previous images. Any ideas what might have caused it? Could it possibly be due to frost on my camera window - I'm using an ASI178MM cooled CMOS camera. I'd be grateful for any suggestions. Thanks Gordon
  8. Makes sense - though I suspect my wife might fall into the other group from you and me
  9. What's the idea with the dual rig - is it so that you can halve the acquisition time or are you planning some clever imaging trick?
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