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About GuLinux

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    Ealing, London, UK
  1. Hello, I bought this little beastie back in May, but I didn't have enough cloud free time to properly test it - except for a couple of solar observations with my Quark. Conditions weren't exactly ideal: light pollution, obviously (I live in Ealing, London), then clouds rolled in just when I was ready to start my sequence, shortening capture time by a couple of hours. Also, the nearly full moon was very close to the target, causing some nasty reflections on the (now cropped out) border of the image. There seems to be some residual tilt on the camera that I need to fix, and processing could be better, but overall I'm quite satisfied by the result though, the Optolong L-Enhance filter seems to be doing a really great job under such miserable conditions 5 hours of integration time (61x300"). Gear: Imaging telescopes or lenses: SkyWatcher Esprit 100 ED f/5.5 APO Imaging cameras: ZWO ASI094MC Pro Mounts: iOptron CEM40 Guiding telescopes or lenses: 365Astronomy 50mm Guidescope Guiding cameras: ZWO ASI178MM Software: GuLinux.net AstroPhoto Plus · Pleyades Astrophoto PixInsight Filters: Optolong L-eNhance Link to AstroBin page
  2. I know it's not the answer you'd like, but registax is, essentially, abandonware. The last release was on 2011, and a software this old is not really supposed to work on modern operating systems. Plus, there's better alternatives, now. For my workflow, I use Autostakkert!3 for registering and stacking, and Pixinsight to replace the old Registax "wavelet" processing: I normally use deconvolution (something registax doesn't have), then MultiscaleLinearTransform (which is essentially equivalent to wavelets), then a few more touches here and there (denoise, histogram equalization, etc). There's probably also free alternatives to pixinsight doing the same things, I haven't investigated so far, but for deconvolution, imppg is a very good choice, for instance.
  3. Ah, yes, telescopes demand is very high lately, and stock is very low in stores.. I was actually thinking of selling my SkyMax, and getting a C9.25 or maybe even a C11, but there would be at least 2 months of waiting, so it's probably better to do it next year, when the major planets are not on "prime time" in the evening I didn't really have much time to look at it visually, unfortunately Weather these days changes very rapidly, so I tried to get as many shots as possible before having the clouds rolling in Mag? You mean visual magnitude limit? I'm not really sure, to be honest... I think mag 3 or 4 I live in the suburbs, so it's not *completely* terrible, but definitely not nice either. But at least visual mag doesn't affect planetary imaging
  4. Yes, I think that my choice of camera and focal ratio really plays to my advantage. The 178mm is a great camera, the small pixel pitch means I can avoid using a barlow, and still get a good sampling rate (slight oversampling), while the good dynamic range of the camera means I can keep the exposure short and bump the gain without significantly increasing noise
  5. Thanks everyone Oh I didn't use any barlow, so native focal length (2700mm), plus a 1.5X resample in software. I know that on a Mak focal length can vary depending on the focuser position, according to my calculations it looks to be around 2770mm in this specific setup.
  6. Hello, this is my attempt at Mars for this year opposition. Seeing was "ok" (at least, as ok as it can be in London), but I wish I had a bigger scope to get more details Telescope: SkyWatcher Skymax 180 Camera: ASI178MM ZWO RGB filters (left), Astronomik IR Pro Planet (right)
  7. The hole is never needed for optical reasons. It is only needed for mechanical reason, i.e. letting the secondary holder pass through the mask. Since this is not a problem on a Mak, it's unnecessary to make one
  8. Finally got a decent night for imaging Jupiter and Saturn, very low here in the UK. Seeing was terrible, but I'm still relatively satisfied with the results, given how difficult these planets are this year from this latitude. Gear used: SkyWatcher SkyMax 180 on a CEM40. ASI178MM, ASI EFW, ASI 31mm RGB filters. Captured with FireCapture, Stacking with Autostakkert, processing with ImPPG, PixInsight and GIMP.
  9. A perhaps easier way to do the same is to use Stellarium, and a panoramic photo app. On android I found "Google Street View" photospheres to be an excellent solution for this. There's an article explaining the whole procedure on Sky at Night here: https://www.skyatnightmagazine.com/advice/diy/stellarium-how-to-create-a-customised-landscape/
  10. I normally use Autostakkert, still a windows software, but it works perfectly with Wine. Registax is far too old nowadays, anyway. I then postprocess the image using deconvolution on Pixinsight.
  11. I know.. same old easy targets.. But perfect test for my new gear. I've always been more of an itinerant stargazer, trying to do astrophotography with my star adventurer and camera lenses from dark places, but since the lockdown I've been wondering on how to better use these rare and amazing clear nights. In particular for this shot I used an iOptron CEM40 mount, with a small 50mm autoguider scope, and a slighly larger (1mm!) Redcat as primary scope. I also used an Optolong L-Enhance light pollution/narrowband filter, and I wasn't expecting to give such amazing results so close to London Center (Ealing!) The CEM40 and the L-Enhance are brand new, the Redcat almost a year old, but barely managed to do anything with it, the camera is an ASI094MC Pro. I also bought an Esprit 100ED and some narrowband filters for my mono camera (ASI183MM), to be tested after I get more confident with smaller scopes (blog post, FYI: https://blog.gulinux.net/en/blog/2020-06-01-backyard-deep-sky-north-america-and-pelican)
  12. Ditto. Plus, I'm a bit wary of these full frame sensors. Great on paper, sure, but a lot more difficult to deal with (need for a bigger flat field, more sensitive to misalignments, etc)
  13. Hi @Dantooine and welcome And as everyone else said, thank you very much for all your precious work! Aaaand, yes, me too just spent a massive amount on new mount, apo, narrowband filters (well, we can't look for dark places, so might as well get started in NB) etc etc. I feel a little less guilty knowing I'm not alone
  14. AstroPhoto Plus.. mainly because I wrote it I often use KStars/Ekos too for the missing features, usually I use the two of them in tandem
  15. Yes, of course, I merely meant the illumination issue
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