Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_imaging_challenge_celestial_motion.thumb.jpg.a9e9349c45f96ed7928eb32f1baf76ed.jpg

don4l

Members
  • Content Count

    486
  • Joined

  • Last visited

Community Reputation

560 Excellent

About don4l

Profile Information

  • Gender
    Male
  • Location
    Camberley
  1. Solid cloud here. The forecast looks good for tomorrow though.
  2. I thought that I had already answered - sorry, I must have forgotten to click the submit button! Moravian G3-16200, Chroma Ha and OIII filters, Tak FSQ-106 with F3.6 reducer. Acquired with CCDCiel, calibrated with CCDStack, and post processed in the Gimp. The camera is new and I am learning how to use it. For some reason that I don't understand, the data needs far less processing that my last camera (an old STL6303). I'm getting far better result than I ever did before, but there are also some "funnies" that I will have to get used to. I didn't plan the colour scheme in the images above - it just turned out that way.
  3. Thank you. And thank you for the feedback about the brightness. I've got two different screens, and my images look completely different on both - so I really have no idea how they look to other people. I do tend to do things manually, but I'm not a complete Luddite! I'm now imaging from my breakfast room using Indi, Linux, Astrometry.net, and various other stuff that I hadn't even heard of 18 months ago. I will be changing ISP soon, and I will probably have another go at APP then. There is only so much time that you can spend trying to get software to work.
  4. Thanks. I think that the software is APP (Astro Pixel Processor). I downloaded the trial version about a year ago but I couldn't get it to work on my setup. From what I hear, it is indeed very good.
  5. This is my first attempt at a colour mosaic. Despite the join being obvious, I am still very pleased with it. I've done several mono mosaics over the past 18 months and been surprised at how difficult it is to match up both contrast and brightness along the edges of adjacent frames. I thought that going to colour would make the problem much worse. It has made it a bit more difficult, but it isn't as awful as I expected. Processing and combining was done in the Gimp. Each panel is Ha, O, O for RGB. The OIII data for the Soul is binned 2x2. Any advice on doing these using Photoshop or Gimp would be much appreciated. All sorts of other comments would be welcome too - especially about how it looks on peoples screens. I have a strong suspicion that my screen is too bright, so I might be posting very dark images!!!
  6. This is the Soul taken with my new 16200 camera. I should really have taken it at F5, but I am doing a mosaic with the Heart, so I wanted the wider FOV. Exposure: Ha 85m 1x1, OIII 50m 2x2 Equipment: Moravian 16200, Chroma 3nm filters, Tak FSQ106 at F3.6. EQ6 S/W CCDCiel, CCDStack, The Gimp There isn't much processing in this image. The frames were calibrated, aligned, and colour combined in CCDStack. The Ha was used as Lum in the Gimp, and the contrast was enhanced using Overlay mode to combine a duplicate of the image itself. I would have had to spend hours processing this with my old camera. There just doesn't appear that there is much to be done with the data from this new camera - or maybe I just need to up my game. I can certainly see how more exposure would make the image better in a way that I just didn't understand before. Comments would be very welcome.
  7. Ouch! There seems to be no end of "lessons learned" in astrophotography. The problem is remembering them all.
  8. I'm not sure if you've just got wrong info in the headers, or if you've got a whole bunch of images of the same place with correct headers? If the images are correct but the headers are wrong, then it can be fixed easily.
  9. I only heard of the Little Sombrero a few weeks ago. It looks like a super target. I look forward to seeing it. Did you finish the Helix, or is it gone for the year?
  10. Some thin cloud has started to appear, and the value of my guide star in PHD is dropping. I'll have a quick binned SII on the Heart to see what it looks like, but I that my evening is coming to an end. I've now spent four nights gathering OIII on the Heart, but tonight's data (110min) looks good enough do something with. I also gor 10m each of R G and B on it., so I've got something to play with tomorrow. A good evening.
  11. 6o mins of data now in, and still going strong. The FWHMs are better than recent nights.
  12. Blue skies here, and the forecast is to stay clear till 4am. I'll try to get some decent OIII on the Heart.
  13. Here is what the centre of the image looked like before using Starnet:-
  14. I've taken a few days to reprocess the image because I had to go back to scratch. The camera was only at -2C for these images, and I had to shoot new 10m darks!!! I've used Starnet to remove the stars from a new colour image. I made a separate colour image of the stars ind CCDStack with unstretched images (Ha, G, and B). The stars were then added back as a "Lighten" layer in the Gimp. I haven't done much other processing. I honestly don't know what to make of the result, so comments are very welcome (Even "Hate it"). Anyway, here it is:-
  15. I tried this last year and I never got a decent result. You have done far, far better. It does look noisy when displayed at full resolution, but the image is coming up at over 5000 pixels wide. Does your camera really have this many pixels, or has the image been upsampled somewhere along the way?
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.