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Favo

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Everything posted by Favo

  1. I have never heard of the "sony star eater" problem. Just searched it and seems like its a problem with the long exposure noise reduction. If thats right than this cant be the problem since it was turned off and I was shooting in raw. I didnt change anything in PS, I just converted the ARW file to TIFF in LR but same result with the origninal raw image. Thanks for helping!
  2. Thanks for the replies! I know that there is slight star trailing but I thought it wouldn't matter too much (at least it doesn't to me). Maybe the heavy amount of distortion in the corners causes the problem. I will try cropping in all the images a bit so the really bad stars are gone. I will try using sequator as well even as I have stacked an image with foreground before in DSS but who knows... I also stopped the lens down to f4 to compensate for the vignetting and corner sharpness. Besides the stacking problem, could you give me some tipps how to improve my astro images? I tried using only one file (the tiff above) but I find it very hard to get a good looking photo out of it. Is it lack in post production skills or are there any limiting factors in the image like heavy light pollution (but I dont think so)? I use Adobe Lightroom and Photoshop.
  3. Hello together, I tried capturing the milky way a few says ago. This isn't my first time doing astrophotography but I ran into a problem. I captured 128 light frames, 51 darks and +100 flat and bias frames. I loaded them into DSS and registered them. Firstly I set the threshold so that ~200 stars were found. All pictures have a very similar score (1070-1400) and number of stars (180-220). There were no clouds. After the first stack the result looked horrible. I looked at the offset data and some images got rotated by over 150 degrees which can't be since all pictures were taken within an hour. Some pictures did't have any offset information at all (NC)! I changed the star detection threshold and tried everything from 15 to 500 stars with the same result. I looked a bit closer which stars got detected and this seems kind of random. The stars that got recognized are not even similar in 2 pictures taken after each other. What else can I try? I used the Sony A7iii with the Samyang (Rokinon) 14mm f/2.8. It was my first night with the 14mm. I stacked a set of images of the Pleiades a few weeks ago with no problems at all (Sony a7iii, Tamron 70-180mm f/2.8). Converting the raw images into DNG didn't fix the issue. Thanks! DSC02847.tif
  4. Hi everyone, as many of you may know, all the raw data from the James Webb Space Telescope can be accessed via the internet. The FIT-files from the NIRCam are monochrome files taken from the infrared spectrum. I want to create my own interpretation of the image but as a beginner, I don't really know how to process the 6 monochrome files taken with different narrow band filters. I've watched the video by Nebula Photos: He uses the paid software Pixinsight but I would like to use freeware. I would be able to process the files with Gimp if I would be able to align the images properly, which I cant manage to do. Otherwise I tried to use Deep Sky Stacker (my go-to when processing DSLR astro footage) to align the photos but DSS cannot handle the FIT files and converting them to TIFF brings the error message "The selected files are not compatible (Width, height, number of colors, number of channels, only one master-dark, offset and flat)" (translated from German). I also tried SiriL and SOA DS9 as mentioned in the video above but did not get any results. So, how can I properly align the different images? Thanks, Favo
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