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Jon2070

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About Jon2070

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  1. An update which hopefully will prove useful, I have been in touch with Mike Schuster on the PixInsight forums throughout the day and he pointed me towards his new script MureDenoiseDetectorSettings (which initially was not showing up in PI even though I have the latest version and all of the repository updates and it had even downloaded but for reasons unknown was not visible in PI under MURE, but after adding it in manually it works great). Using two uncalibrated flats and darks it gives the gain and gaussian noise that you need for MURE, no need to divide by 16, they work straight out of the box and provide a very pleasing result. So for the data above, the gain is correct and the Gaussian noise is 27.71DN.
  2. Thanks, I still don't fully understand offset, but that helps to know that calibration removes it. I have attached a before (bottom image) and after, one with variance at 0.8 (top) and the other at 1.0 (middle), I have used a heavy crop as well.
  3. Thank you Martin, a very nice image by the way! I have just used flatSNRestimator for my G139 O21 Ha flats to get the figures for my Ha data. It gives me Gain 0.061 e-/DN and temporal noise of 715.11 DN. If I leave the Gain as 0.061, but divide the temporal noise by 16 to get 44.69 and put these values into Mure I get what looks like a nice smooth result. If I divide the gain by 16 then I get this horrible granular result, likewise if I don't divide the temporal noise by 16. So is that what you are doing? Leaving the gain given by flatSNRestimator as it is but dividing the temporal noise by 16 to give you the gaussian noise? Are temporal noise and gaussian noise one and the same, the difference being between 12 bit and 16 bit here? I just left the Offset at 0, despite using an offset during capture, I'm not sure whether this is correct or not? Also have you left variance scale and cycle spin-count the same?
  4. Have you had any joy with Mure Martin? I also have the ASI1600MM and have had the same problem that Mure doesn't seem to do much, although many people hold it in high regard which is why I would like to use it. I tried dividing my Gain by 16 but the result was way over-smoothed. Also as a side note the script loaded the metadata successfully upon first attempt including the Gain, Gaussian Noise and Offset, but I'm not able to repeat this. It will however load the combination count and interpolation method repeatedly.
  5. I am new to imaging with telescopes, so far i have had good results with DSLR lenses mounted on a Sky-Watcher Star Adventurer. I have the opportunity to use an Orion Optics ODK12, I understand that I will require a T ring adaptor and one or more extension tubes, has anyone had experience attaching a full frame DSLR to an ODK12 or similar that can point me in the right direction please?
  6. Hi all, I use my Nikon D750 95% of the time for daytime imaging, so far I have done nightscapes of the milky way and recently I bought a Star Adventurer and have been really pleased with the results that I got with my Nikon 180mm f2.8 lens attached. I would also like to attach the camera to larger telescopes that my local Astronomical Society has. I am interested in increasing the Ha sensitivity, however I would like to continue using the camera for daytime imaging, I have read a lot of different posts here and other places and I'm still none the wiser. So far I have gathered that the IR filter is removed which sits in front of the camera's sensor and is replaced with a filter that lets through the Ha wavelength, however a custom white balance is required for daytime use. Does this custom white balance overly matter as it can be altered in Lightroom/Camera Raw? I also read that an external IR filter may need to be fitted to each lens (a bit impractical and is this only when the whole IR filter has been removed from in front of the sensor - full spectrum mod?).
  7. Hi everyone, my first post on here, still finding my feet with PS. I have the Noel Carboni Astronomy Tools Action Set, I am trying to remove the purple halos around stars in an image of the Large Magellanic Cloud, however when I use the tool it removes a lot of the colour in the nebulosity of the (dwarf) galaxy (I also used Defringe in Lightroom which had the same effect). I have tried to select the galaxy with the lasso tool and invert the selection and then run the action, however it applies the action to everything regardless. I wonder is there a simple way to separate out the galaxy, run the action and then put the galaxy back in? Can it be done using a mask and then blended back in? If so I'm not quite sure how to do this. Thanks in advance.
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