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x6gas

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x6gas last won the day on June 27

x6gas had the most liked content!

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About x6gas

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    http://www.ir-astro.com

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  1. That's lovely Adam. Ha monochrome is wonderful... I don't usually post my Ha but I'm going to reconsider that decision...
  2. Excellent images Brendan and I do really like your processing which resists the temptation to oversaturate or over-sharpen. Really top-notch stuff. I also like, and entirely agree with, your philosophy and sentiment "I was so proud of my achievement (I actually photographed a nebula that I could not see) - as you should be, regardless of what level you are at. This is not an easy hobby"
  3. x6gas

    Hello world

    Welcome to SGL.
  4. Hat's off Ciarán. I think that's an incredible result given how low this is in the sky, the conditions you mention and that you've used a one shot colour camera. Absolutely remarkable and I'd be delighted if I managed that.
  5. That is a huge improvement Robin - and a really lovely image, congratulations! Thanks for your kind words but the improvement is really all down to you, your determination and dedication, I just gave you a couple of pointers. As for getting this in the right forum, one of the mods (@steppenwolf or @MartinB or @John) should be able to move it for you.
  6. Lovely image Carole. You've got the colours of the Ha exactly right for me - not too pink, but not too crimson.
  7. That's very nice. Despite having a large angular size M33 is a tough target... I agree with others that on my monitor it looks just a bit over-saturated, particularly the reds but that's a matter of personal preference.
  8. 1.25" nose piece to M42 t-thread, 5mm shoulder - SOLD 1.25" female to t-thread adapter, 3mm shoulder - SOLD I'm unable to edit the original post so mods please move to completed and I'll repost the remaining items. Thx
  9. Nice write-up Frooby and congrats on the progress you've made. Look forward to seeing more of your images in future.
  10. Some good data there. I have to say that the Crescent is one of those targets that almost always looks over-processed to me and I do find this a bit harsh personally but you've got good definition and good detail so... as long as you're happy with the scheme it's a job well done.
  11. I do like the most recent image you posted Jason, but the first one (the jade one) is something different and sometimes it's good to be different!
  12. Ah... it's a good question. There is a lot written and discussed about this: lots of theory, plenty of opinion. But from my experience focal length and image scale are more important than f-ratio. If you are imaging a small target (small galaxies or planetary nebula) then you want longer focal length, but you also want to match the focal length of your scope to the size of the pixels on your camera sensor. You'll ideally need an image scale per pixel that is half to a third of your best seeing conditions. Image Scale Per Pixel (in arc seconds)= (~200 * the size of the pixel in microns) / focal length in mm (iirc) Typical seeing in the UK is, I believe, one or (more likely) two arc seconds so you should be aiming for an image scale in the range 0.33 to 1 arc second and you ae probably pretty safe at the thick end of that... This should ensure that you are not over or under-sampling your data. After that, the lower f-ratio the better but it's really only fair to compare a 1000mm focal length f/5 scope with a 1000mm focal length f/10 scope when you are talking about how fast you can acquire the data...
  13. That's a lovely, lovely image. Wonderful field of view and beautifully framed. Just goes to show you don't need blingy colour (or indeed any colour) to create a stunning image.
  14. I like this Mark - your choice have colours has brought out some interesting variation with the nebula.
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