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About john2y

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    Brno, Czech Republic
  1. Hey guys, ever since I got this mount, it's been over a year, I've been having these weird oscillations. They seem to be random and it doesn't matter how good balance, polar align or star alignment I have. They're appearing and disappearing randomly, sometimes I can shoot 2 hours with a good guide graph and other nights I can't take a single image. Here you can see that the oscillations eventually smooth out. This one is much longer period of time and you can see that they're in amplitude as well as periodicity. I've tried factory resetting the mount, all different settings in PHD2 but still nothing. Could it be that gears are simply worn out? I'm saving up for Cem60 but I would still prefer if it would be fixable. Thanks for any suggestions. Jan
  2. john2y

    Melotte 15 the Heart of the Heart

    Those are really nice data and those details are amazing but if I'm to be honest the image looks washed out, I would definitely pulled more on the curves as it would reveal more details hidden in the dust, the added noise shouldn't be a concern as the data looks buttery smooth.
  3. john2y

    Eagle Nebula (M16) SHO reprocess

    Definitely better! You can remove the magenta by creating magenta mask using script color mask or by inverting the image and using SCNR to remove green Also I would soften the deconvolution, when setting the deringing you can increase the global bright to reduce the white structures it sometimes makes in the brighter spots, it is visible right on the eagle a bit.
  4. john2y

    M33 HaRGB

    Thank you for that link, it was interesting to read and it definitely fits to my situation where I can't see anything as the telescope is now warm.
  5. john2y

    M33 HaRGB

    Thank you
  6. john2y

    M33 HaRGB

    I was looking at those too and honestly I can't find what causes those. I thought that it could be some screw or something but after inspection of the whole telescope, filterwheel all the way to the sensor I can't find anything that would disrupt the light beam.
  7. john2y

    M33 HaRGB

    Thank you, you won't regret it, I was coming from modified dslr and the difference in sensitivity is incredible, only down side is that you have much more work ahead of yourself to produce one single image but it's very well worth it Thank you!
  8. john2y

    M33 HaRGB

    So I switched cosy balcony imaging for a trip to my cottage to get to the dark sky to do some RGB imaging which I can't do in the city. It was also first test of my new guider asi120mm mini. My plan was to shoot M33 whole night and do HaLRGB combination but due to some complications I was only able to get the RGB data (I had the Ha data for a couple of weeks now from the city). The biggest issue was that the power brick for my camera fell off the velcro and was pulling on the telescope, the mount couldn't handle it and I noticed it after more than hour of bad images. Overall it was a great night and when I got home at 5am I was really happy. The temperature got down all the way to -10°C during imaging which was quite cold but worth it. Data: 45x120s for RGB and 20x180s for Ha Telescope: Explore Scientific AP 102/714 ED APO Triplet with 0,8x flattener Camera: ZWO ASI1600MM Pro with ZWO filters Mount: Celestron CG5 Advanced GT (my little oscillator) Software: PHD2, SGP and processing done in PixInsight and Photoshop And just for the lolz, while shooting R channel, there was quite a traffic
  9. john2y

    NGC 1491 in mono

    In my opinion not worth it, I've spent almost 30 hours on this target and regret it. The center is really bright but the rest is so faint that in order to produce noiseless images you need so much time and the night sky is full of much nicer objects.
  10. john2y


    Really nice data but what did you use for colour calibration? Stars should be blue, not magenta. Also I would't be afraid to pull on the curves more
  11. john2y


    I think you went too far with star reduction, look at that diffraction spike, it should be straight and yours is wavy.
  12. john2y

    The Wizard Nebula Sh2-142

    Incredible details, I absolutely love it!

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