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Found 6 results

  1. Hi, Have you noticed how advanced Gimp has been with the new version 2.10 ? Now it work perfekt to open Fits 32 bit floating point images and process them. I have tried this many times earlier but it never worked very good. Now it's like a dream to work with. I'm in the learning process how to use Gimp's capabilities. I have now got the opening process of three grey rgb images to work. It's of course not very complicated, but for me who never used Photoshop or something simular it was and I had hard to find a tutorial for the new version. I have now made a tutorial for this first step how to start with Gimp and open 32 bits separated color images: http://www.astrofriend.eu/astronomy/tutorials/tutorial-gimp-astrophotography/01-tutorial-gimp-astrophotography-introduction.html If you already working with Gimp, have you found something of special interest ? Lars
  2. beka

    DSLR M31

    Hi All, Having had to move to an apartment where I could not use my CPC 1100, I decided that I have to see what I could do with my NexStar SLT 102 (alt-az achromatic 102mm f6.47 refractor). Setting up on my narrow balcony was challenging and the altitude bearing was so loose that it almost moved from the weight of the Canon 700D. I could not see M31 in the estimated 3.5 magnitude sky so I did a two star alignment and used the live-view to focus on a bright star. I then took a 15 second exposure after slewing to M31 which allowed me to see that I had it in the field of view. After a few more 15 second exposures and playing with the motion controls I managed to get it centered. The resulting picture is from 39 subs of 30 seconds at ISO 1600, 9 flats. The images were stacked and stretched with Siril and then I played with the curves on Gimp, cropped and scaled. Not too unhappy.
  3. Does anyone have the GIMP 2.9.x 16-bit dev.portable for 32bit Windows version that used to be on the Darkrefraction site please ? (and a dropbox or similar cloud to sit it on download it from) and thanks to Louise for telling me about it.
  4. Hi all, i just wanted to share a new Gimp 2.9 Beta for Mac. Its a bit work to google it (its not in the first three hits ) so i added a link. So far, i have not hit any bugs. The "big thing" is that you can work now with up to 64 bits loating point values for each colour value of a pixel. You can get it here https://www.dropbox.com/s/3xvttsjv00p0n8i/McGimp-2.9-cc.app.zip?dl=0 I have scanned the file with an up to date virus scanner- no hits. However, everything free comes with no guarantee
  5. Hi All I'm playing around with layers in GIMP as I had no idea how to use them two days ago, but am now fairly comfortable loading a couple of images, aligning them, adding a layer mask and using the paintbrush tool to allow one to come through to the other. The plan is to have a go with some long and some short images of Orion and combine the two final stacked images to get the nebula and the core. I need to work on getting the two stacked images' "brightness" levels more similar as the ones I am playing with are a bit different and when using the paintbrush tool to bring the rear image "out" the blend isn't very subtle. Am I working on the right principle here, or is there a better way to merge or blend in GIMP? I've tried using those controls, but they don't seem to change anything, so I suspect I need to so more work in that area. If anyone has any favourite tutorials that they use and are willing to share that would be great. Cheers!
  6. Hi all, I have found a prerelease binary version of the upcoming GIMP for Mac OS X. Given it some basic testing, and it works with 32bit FITS data like a treat! Also gave the file basic virus testing, but do crosscheck it again if you download it. You can get it here: https://www.dropbox.com/s/7huyb35612qlc13/Gimp-2.9.zip?dl=0 Be careful with prerelease software though. Do keep the originals safe and only work on copies of your data - just in case!
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