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Paul Byrne

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About Paul Byrne

  • Rank
    Vacuum

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  • Location
    Ireland
  1. Hi guys, My CPC11 appeared to have a lot of backlash so I opened up the arm and took a look at the motor and gears. The worm gear seems fine but the motor gearbox itself seems to have a lot of play and is affecting guiding with PHD2. Does anyone have previous experience of this and would a new motor/ gearbox assembly have less play in it. See video below. https://youtu.be/hQ9MhGClbzE
  2. It sure is, collimation is ok on a defocused star, not perfect but ok. I know focus tolerance is very tight with hyperstar but it’s strange the fact I can’t even get a “recognizable” diffraction pattern with the mask even after focusing as best I can with Backyard Eos. I have contacted Starizona so hopefully they will have some suggestions. Thanks for your help.
  3. https://www.astroshop.eu/focusing-masks/farpoint-bahtinov-focus-mask-for-11-celestron-sc-hyper-star-variant/p,45166
  4. This is it here. It sits at the glass.
  5. Thanks for the replies guys. I will try and sort the collimation issue on the next clear night (hopefully tonight!!). I am using the Farpoint Astro Bahtinov "Hyperstar Variant". https://www.astroshop.eu/focusing-masks/farpoint-bahtinov-focus-mask-for-11-celestron-sc-hyper-star-variant/p,45166 The images below are as follows. Faint stars showing the diffraction pattern when at "best focus" after focusing with Backyard EOS FWHM and putting the mask back on to see what pattern it would show. Peladies at that focus. Polaris, the irregular shape on the left of the disk is the USB cable cover of the Canon 6D. The Pelaides shot shows a focus and collimation issue, I just hope its not a corrector plate alignment issue aswell!
  6. Hi guys, I am just starting with a Hyperstar on my wedge mounted CPC11 with a Canon 6D full frame DSLR. On most of the guides I see that are related to focusing Hyperstar using a Bahtinov they show the usual nice Bahtinov diffraction pattern you get when focusing at the prime focus position. However I just seem to get an image that matches the pattern on the mask regardless of how far either side of the focus limit I go. I can get the image sharp and bright and when I remove the mask my stars look ok, but it is certainly not the 6 point diffraction pattern. Is this normal, sorry probably a very basic question! I have a collimation issue too but I believe its a case of one step at a time with Hyperstar!!
  7. Wow, what a brilliantly constructed forum. So much information. Hi all!
  8. Paul Byrne

    Hi all!

    Just joined too, some awesome information on here!
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