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Found 9 results

  1. Slowly dabbling with narrow band and the processing that is becoming more like art than science I really am enjoying it though, Imaged this in my red zone back garden last night, it's 10 x 300 secs each of Ha Oiii and Sii ( no darks as they looked weird ) Thanks for looking / feedback. DSS - Photoshop levels / curves - gradient xterminator - photoshop channel combine as per @swag72 tutorial - photoshop levels to balance colours to my taste - slight noise and star size reduction (Noels tools)
  2. I scrapped all the Oiii and Sii data I previously took during a full moon (about 15 hours worth) and retook it all when the moon was a bit smaller at 76%. Ha was taken during 98% and 67% moon. All the lights were taken on the following nights: 12th, 19th and 20th September 2019. Integration times, all in 600s subs unbinned: Ha = 28.33 hours Oiii= = 5.67 hours Sii = 5.67 hours The Ha data is really nice, and unsurprisingly the Oiii and Sii is not as strong (or nice). I'm missing that (vital) step in my processing routine of getting the Sii and Oiii properly stretched to match the Ha, before combining. I dont really know how to deal with the weaker data properly. Any pointers would be appreciated. What I do currently: All the data is loaded into APP into separate channels/sessions. The data is stacked and registered against the best Ha sub This produces individual stacks of Ha, Sii and Oiii that are all registered Each channel is processed with DPP in APP and then saved as a 16bit TIFF Each is opened in PS Stars removed with AA and any remnants removed and tidied up I then open a blank RGB document in PS I paste Ha into Green, Sii into Red and Oiii into Blue Adjust the selective colour settings to get 'Hubble palette' Adjust levels, curves, saturation until looks ok All the Ha Sii Oiii data is then combined together in a single 'super' stack in APP using quality weighted algorithm to create a 'luminance' That luminance layer is adjusted using levels, curves, and NC tools such as local contrast enhancement and deep space noise reduction (using masks to apply as required) The luminance is pasted onto the above colour layer, and incrementally added using gaussian blur Cropped and saved. Here it is anyway I haven't intended on any more exposure time for this one, but will consider it, if the expert opinion dictates otherwise! CS Adam
  3. Second image with QSI660. 10x200second subs in Ha, Oiii and Sii. Combined in Maxim with Hubble palette (ish0. the green seems a bit strong, but I suppose that reflects the high Ha levels being dominant.) Darks and Bias frames used for calibration. No flats.
  4. From the album: Widefield DSO

    Revisiting the data on this one since I found a tip today on implementing the Hubble palette.
  5. In June, I managed to get just over 11 hours data for an SHO Pelican Nebula. SGP's Framing & Mosaic wizard makes it relatively straightforward to plan mosaics built upon an existing image. This, therefore, is a two-panel mosaic of the North America and Pelican nebulae in SHO captured using my dual WO Star 71 Rig. Details WO Star 71 x 2 Moravian G2-8300 x2 Mix of Astrodon and Chroma filters Ha - 32 x 12000s = 10 hours 40 mins OIII - 24 x 1200s = 8 hours SII - 24 x 1200s = 8 hours That's 26 hours 40 mins total I built the mosaic using a trial version of AstroPixel Processor. (I also did it in PixInsight, but APP seemed to give me more usable area on the combined panels.)
  6. Picked up some editing tips today and went back to some old data to see how it works... I think it did While it is easy to assign narrowband data in Hubble palette order, I've never got the look remotely close, but this looks a good step in the right direction. For comparison, my previous version is below. I know, I still have to work on the stars... I don't have the notes to hand, but this was done on DSLR using Astronomik narrowband filters and not enough focal length.
  7. From the album: Widefield DSO

    34 x Ha, Astronomik 12nm filter, modified Canon 450D 28 x SII, Astronomik 12nm filter, modified Canon 450D 61 x OIII, Astronomik 12nm filter, standard Canon 600D All 4m subs, with flats. Hubble palette: R=SII, G=Ha, B=OIII
  8. From the album: Widefield DSO

    Large region of Cygnus presented in Hubble palette, or at least the nearest I can get to it.
  9. From the album: Deep Sky Objects

    My first attempt at narrowband imaging. For more detail the astrobin link is: http://www.astrobin.com/254346/B/
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