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Adam J

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Everything posted by Adam J

  1. Adam J
    I think that the 294 would be a better choice with that scope.
  2. Adam J
    Well that looks like the double cluster so I think that you are a little off target.
  3. Adam J
    The imx533 is a much superior sensor for astronomy Vs the imx183 the lower noise and bigger pixels make it much more sensitive. In terms of pixel scale both will work fine with your scope.
  4. Adam J
    I recommend these: https://www.firstlightoptics.com/adapters/baader-t2-fine-adjustment-rings-aluminium.html I strongly advise against the cheaper plastic set. They need to be placed after the 0.8x flattener on the camera side. Adam
  5. Adam J
    I would say you need a little more spacing 0.5 - 1mm and that you have a little tilt on the right too side too, tilt is not uncommon on a DSLR though and is usually caused by poor fitting t-adaptors. To get rid of the purple you will need to us a narrow UV IR filter, the key being to cut the blue end at 420nm or more. All in all I would not say this is a disaster.
  6. Adam J
    What corner am I looking at here? Can you post the whole image please?
  7. Adam J
    You may have a duff copy, post some images.
  8. Adam J
    Because it's optimal independent of gain setting so even at gain zero it's fine. Also it's such a minimal impact on dynamic range in most cases that it makes no meaningful difference. Hence it's a good default and advanced users can do what they want to do.
  9. Adam J
    Very nice, great corners, what spacing are you using please?
  10. Adam J
    Yeah that just looks fake because it is. If i was generious then i would say its a product of two exposures, one for the moon and one for the foreground and that the clouds moved between the two exposures.
  11. Adam J
    Not sure about QHY but ZWO power the camera from USB and only the cooler is powered by the 12volt supply. Hence if this is the same is the new laptop supplying sufficient current from it's usb ports?
  12. Adam J
    Very nice. In terms of the Hb I am left wondering if a fair amount of what you are seeing may be reflection nebula breaking through the Hb band pass as opposed to such a difference in the pure Hb in comparison to Ha. It's the first time I have ever seen a Hb shot produce anything that is more than just a weaker copy of the Ha data.
  13. Adam J
    I would like to know this too @tooth_dr
  14. Adam J
    You seem to have much worse halos than i see in @tooth_dr 's image above. I think he has a slight OIII halo but thats to be expected on a star as bright as Gamma Cygni, hence i considered his results be be quite good, in this case that SII reflection seems a little abnormal to be honest. Which version of the filters are you using? Adam
  15. Adam J
    Thats not acceptable and not like Baader to be honest, I have always found their filters to be immaculate in the past and I have had quite a few. I would simply send it back its not ok.
  16. Adam J
    Not really following your argument the starburst is generated by on chip electronics and can't be removed by anything done by the camera manufacturers.
  17. Adam J
    I think that the thing to remember is that the moving to a smaller sensor and a longer focal length at the same time will greatly reduce the field of view from your current setup. Personally I would go with the GT71 as it's a triplet shorter focal length and will make the most of the 533 sensor.
  18. Adam J
    If it can prevent reflections on CMOS then it will do an even better job of preventing them on a CCD.
  19. Adam J
    As a high speed filter it will be frequency shifted to compensate for the shift due to the angle of the light cone from the edge of the objective / primary. Adam
  20. Adam J
    Either that is a bit of dirt nipped under the retaining ring or its a scratch and should be replaced. Have you taked to the supplier? Adam
  21. Adam J
    Yes, I re-greased it and get crazy good guiding from it. 0.8 arcseconds RMS often.
  22. Adam J
    I have the AZ GTI and it's great. But I do not use that tripod I use the I option 1.5 inch steel one and it's great. https://www.firstlightoptics.com/ioptron-mount-accessories/ioptron-3-8-stainless-steel-1-5-inch-field-tripod.html
  23. Adam J
    I guess you know because it was late and the box had been opened.
  24. Adam J
    Oh the 127 on the AZ GTI for me without any doubt. That mount is just so flexible.
  25. Adam J
    11 inch ADM imperial is the way to go, don't do what I did and not notice it included bolts with it.
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