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AngryDonkey

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About AngryDonkey

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    Oman
  1. Come on! Really? How shallow... I expected better from a site like this! We all know it's what's on the inside that counts!!! What if one of the lenses had a hairline crack?
  2. Great that you managed to get this resolved. Better this outcome than a faulty filter! Have done quite a few similar things myself.... Mike
  3. Good effort! PI has a bit if a learning curve, I've been using it for a couple of years now and still I feel like a beginner (but don't let that put you off )! I'm no expert but it looks a bit 'over processed'. It's tempting to be aggressive to bring out the detail but more often than not the image suffers for it in other ways (like your red stars and also the black rings around stars). I've found it really important to learn how to generate good masks. This will allow you to apply a process more targeted to the area you need it in and prevent it from buggering up the rest of the image. For star reduction there is a good tutorial here (there are a lot of good tutorials in that site, also about masks): http://www.lightvortexastronomy.com/tutorial-reducing-star-sizes.html
  4. AngryDonkey

    Pacman : PixelMath vs. Annie's Astro Action

    I have never used Annie's Astro Action and can't drawn any comparisons but I've worked a lot with PixelMath recently and have to say that although this seems a pretty simple tool at first, when you get deeper into it, you realise how powerful it can be (If you know how to mathematically express what you are trying to achieve). For example I didn't realise until recently that I could add conditional statements to the formulas in an Excel like manner. This opens up a lot of possibilities when combining narrowband data. Here is an interesting example I've lifted off Reddit: Red: iif(ha > .15, ha, (ha*.8)+(oiii*.2)) Green: iif(ha > 0.5, 1-(1-oiii)*(1-(ha-0.5)), oiii *(ha+0.5)) Blue: iif(oiii > .1, oiii, (ha*.3)+(oiii*.2)) It seemed to work well with my HOO data.
  5. There is a really long thread on the Cloudy Nights forum with regards to Optolong narrowband filters. I'm not sure if this is your problem but there have been a number of users who claim that their Optolong filters were definitely 'off band' i.e. leaking light outside the specification. So one possibility could be that your OIII filter is slightly off band and therefore collects more light. If you think that could be the case and the filters are new you might be able to speak to the supplier to get it looked at. Not sure if there is a good test for this though that you could do at home... In any case, as has been mentioned above, star reduction on the OIII image might be the best way to get better results when combining. Edit: This is the thread if you have an hour or two :-): https://www.cloudynights.com/topic/602155-testing-optolong-and-baader-narrow-band-ha-sii-filter/
  6. I don't think so. Can you tell us what filters you are using (brand and nm range)? Some filters seem to suffer from reflections more than others and produce halos (and anecdotally OIII seems to be a particularly problem child). Also some filters have a direction arrow on them to position the reflective coating on the correct side, might be worth checking if this is pointing the right way.
  7. I'm just processing Pacman in Ha and OIII myself and comparing the OIII stacked image there are definitely a lot more and brighter stars. What kind of OIII filter are you using? It actually looks a lot more like a luminance or RGB image than narrowband. Is there any chance that you used the wrong filter at all? I only mention this because this is exactly what happened to me a couple of trips back. Luckily I checked the first frame and it just looked off, turned out I was using the R filter instead of SII... Edit: I've attached my stacked OIII for reference. This is with an Astrodon 5nm OIII filter.
  8. AngryDonkey

    SGP and two scope setup, one PC

    PM sent
  9. If you have a dog, bring it! If you don't, get one! alternatively look for some astro friends. Never felt unsafe personally but I live in a very peaceful country. Although I do look out for scorpions and aggressive donkeys.
  10. AngryDonkey

    SGP and two scope setup, one PC

    Same as Alan, I usually create four Windows desktops. One for each camera, one for PHD and one for all the rest. This works great and it's easy to switch between them. There are some apps which struggle with this a bit and seem to come up on all desktops (like the Avalon StarGo) but they can be easily minimised.
  11. AngryDonkey

    Aperture Fever.

    This might be the cure: Clements Scope You can't argue with 70inches
  12. AngryDonkey

    Tilt on a G3, should I worry?

    I've had a similar problem with the WO Star71 II and in my case it was the camera angle rotator that caused the issue. I think it's poorly made (certainly compared to the Takahashi one I have) with just the one narrow screw which is quite difficult to tighten properly. It seems to be fine now for me if I really give it some welly but I am still considering removing it to be on the safe side.
  13. AngryDonkey

    Colour All-Sky camera and lens choice?

    I think the ASI178MC is a great all-sky camera. There are a few of us using it with the AllSkEye app and images come out really well with the higher resolution and format of the chip. I'm currently using the stock lens but there are better options from Fujinon. There is some good info in this blog post: https://blog.orionranchobservatory.com/new-all-sky-camera/ And here is site which shows the 178MC in action (with a Fujinon lens): https://www.astropage.nl/weather/
  14. Thanks for the vote of confidence! It's an interesting project so I don't really mind spending a bit of time on it.
  15. Yes it can be quite a pain! Luckily I only have to worry about cameras. Can't imagine supporting something like SGP... Thanks for spotting the typo, now fixed.
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