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Posts posted by Shibby

  1. Sorry to bump an old thread, but I was considering my options as to using an LP filter (such as the newer IDAS V4) to improve my luminance data. I have fairly heavy LP and currently just shoot through an L filter. I find it difficult to extract faint details due to this, even with large volumes of data.

    However, some reading around leads me to believe it's a bad idea because an LP filter can actually reduce your SNR and also affect the sharpness of your images. Take a look at this thread

  2. Yeah I have no ventilation in my warm room, but it is fully lined with vapour barrier. Just open the door when you finish and let it vent through your well-ventilated scope room. @Gina if you vent in to the scope room, you'll inevitably get turbulence as the warm air escapes and this could actually affect your images. If I ever have my warm-room door open while focusing, the difference is huge - the image goes all blurry!

  3. 5 minutes ago, Wonderboy said:

    what type of telescope would be best for getting clear, colourful and accurate DSO's

    It depends what you mean by clear. As your DSLR is one-shot colour, you'd want accurate colour correction - that's expensive when it comes to refractors. Newtonian reflectors need a coma corrector and good collimation. Good tracking is very important. As you're in a suburb, a light pollution filter is also something you need to factor in.

  4. Just a quick note on the reflector issue you mention - imaging DSOs with a barlow is definitely not a good idea for a number of reasons and will prove difficult. I understand that brands like Skywatcher do not sell their "DS" editions in the US? [EDIT: sorry, just realised you're in Aus!] There surely must be other brands that have the extra back-focus required to easily reach prime focus with a DSLR though? You asked about cheaper refractors - the problem here is that refractors really need to be very good quality to achieve good quality images, whereas you can get excellent images with a much cheaper Newtonian telescope + coma corrector. In my opinion, the only potential downside that's relevant is that they're slightly higher maintenance and larger, although not necessarily heavier.

    Remember that the mount is massively important for DSO imaging, so it's wise to invest in that first, giving you the option to upgrade optics later.

  5. Very nice. It really is a faint nebula though, isn't it? I imagine you'd need longer subs to bring out all the dusty bits.

    16 hours ago, Ibbo! said:

    unless we have another moonless clear night in the near future


    • Haha 1

  6. That's come out very nicely indeed! You've managed great colour considering that you've merged the Ha in and have a relativity smalls set of colour data. 12 hours?? I just don't have the patience for that kind of effort! It was certainly worth it, though.

  7. 22 hours ago, carastro said:

    I managed to get a bit more blue coloration on Oiii in PS by using Image adjust/selective colour and twiddling with the Cyan, Blue and magenta.

    Thanks, I'll have to try that. I tried adding an additional blue Oiii layer which helped a bit but not much.

    21 hours ago, vlaiv said:

    It indeed looks little dimmer than how it would usually be processed by most people

    It's a real problem how different it can look - my newest/best monitor is far brighter than my laptop & work monitors. Do colour profiles help in some way? ??‍♂️

  8. I'm not particularly happy with this one having processed it. The Oiii is a bit noisy and I had to reject a few subs as my balance wasn't quite right on the night. However, I don't think I'll be getting any more data soon, so I'll post it as it is now!

    I've also been struggling to get the brightness right, as it looks very different on each monitor. How does it look on your screen? Anyone got any tips?

    The image is bi-colour Ha+Oiii. I gathered some RGB data for the stars, which I applied as a colour layer. The upload is at 50% - it does get scaled down in the post, so click through here for the full upload.


    • Ha 7nm: 15x600s
    • Oiii: 3nm 16x600s
    • RGB: 3x4x120s


    • Atik 460ex
    • Skywatcher MN190


    • Like 11
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