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don4l last won the day on December 30 2019

don4l had the most liked content!

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About don4l

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    Sub Dwarf

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  1. don4l

    NGC 6992

    I do like the way the colours have come out. Very nice indeed.
  2. Only a quarter of the pixels would pick up any Ha, and that would be through the red filter on each pixel. I bought my first mono camera after spending 10 nights trying to image M16. The first 20 minutes with the mono/Ha filter combo picked up a much, much better signal than my old EOS300 had in 10 nights. I didn't try the Ha on the EOS, but I'm fairly sure that it would have been mediocre at best.
  3. Clear here, but the wind is howling. It sounds like an Autumn storm. No chance of imaging.
  4. Forecast for tomorrow - clear, but windy. We'll have to see how it goes.
  5. It's looking autumnal here. Lots of thick cloud with clear bits in between - all illuminated by a low Moon, which is behind the trees. No imaging tonight.
  6. Your post has made me think about this. I completely agree that mono images can be very nice. I've decided that another row above and below this image will produce a much nicer result than a (probably) failed attempt at colour. I've had a quick look at the pane that would be below the Tulip, and there isn't much there. However, even if there isn't much of interest, I suspect that the overall image will look much better. This will be my project for the next couple of months.
  7. ASTAP, Astronomy.net and Elbrus all prefer to work on simple calibrated images. When I try to display these in CdC I have to play with the display settings in (Settings -> Pictures -> Background) to get the image to display properly. So, I produce "stretched" images in CCDStack. These will display very nicely in CdC, but CCDStack strips most of the FITS header. To replace the fits information, I open the solved image in ASTAP and copy the header info from the FITS window. I then open the stretched image, and use Ctrl V to paste the header into the stretched image. All images then display properly with the CdC image settings at "default". This also allows me to put colour images into CdC.
  8. I'm a great fan of ASTAP, but I don't use it for image processing at all. It is a fantastic plate solver, annotator and asteroid finder. It is also very good for manual editing of the FITS header, which I have to do to display my images in Cartes du Ciel. I think of it as a Swiss army knife for astrophotography.
  9. Are ther other stars in the shot? How did they look? Arcturus is very bright, and several things could make it look "wide". A bit of haze in the atmosphere could make it "glow", for example.
  10. This is a mosaic that I put together using Affinity Photo. It only took about two hours to produce the mosaic, and I am still learning how to use the software. This job would have taken me a couple of evenings using Gimp. (Panels never align properly, and there are gradients which clash between panels). The two left hand panels are about 30 mins each, the rest are 70 mins. Most of the data was gathered binned 2 x 2. I hope to gather another 120 mins OIII per panel to produce a colourful panorama, but who knows how long that will take. Possibly years! OTA Tak FSQ 106 at F3.6 on EQ6 with G3 16200 camera and Chroma 3nm filter.
  11. The Veil is very good in OIII, and you can get nice images at almost any focal length.
  12. I believe that this is true. The Baader filters are designed so that they work correctly if screwed into a nosepiece attached to the camera. In other words, the threads should be on the camera side. Most, but not all, filter wheels should accommodate the filters correctly. My Moravian filter wheel is threaded on the wrong side, so I would have to use unmounted filters.
  13. I've been following lots of the youtube tutorials, and they do seem to be very good. There is very little Astro related material, but I am learning a lot about image processing in general. In particular, i am finding it very good at cosmetic stuff, like removing gradients, background noise reduction, and selective sharpening. I can already do these jobs in Gimp, but they are much, much easier in Affinity. Another area that I've had success with is in colour tweaking narrowband images. Your problem with adding the Lum may simply that there isn't any more "information" that it can usefully add???
  14. That is some cracking data Gina.
  15. The image has a lovely natural feeling. I've never done a proper RGB / NB image, but I am certainly going to give it a go. I've also been playing with Affinity Photo, and I've now bought a copy. I'm still using Gimp for some tasks, but Affinity is now my main processing tool.
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