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David_L

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About David_L

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  1. ASI1600mm cool

    Nice shot of this object :-) I use 139 gain, 10 Offset, 60 sec for L, 120 sec for RGB and 5 min for narrow band and love the results I get :-) Hope that helps David
  2. M31 - ASI1600MM - LRGB - 5hrs

    At the risk of doubting your processing methods I have to note that I had a problem with the core in Luminance when adjusting levels in white point - when I did it with mid tones it was great. Hope that helps. David
  3. M31 - ASI1600MM - LRGB - 5hrs

    I'm using unity gain at 139 and offset of 10 and haven't changed it for any of the images in my gallery on my website so far. Hope that is of some use - please don't hesitate to contact me if I can help further. David
  4. M31 - ASI1600MM - LRGB - 5hrs

    That's a great idea - I actually didn't think of that - thank you ☺ David
  5. This imaging session, occurring over 2 nights was not without its mistakes and confusion! Setting up the first night I seemed to spend most my time trying to remember how to configure the capture software correctly. The second night I decided not to connect the guide camera to the PhD Guiding 2 correctly and spent 30 minutes establishing that fact. However, out of the jaws of chaos (which extended to the processing of the image) came one of my better efforts on this object. It’s also the largest amount of data I’ve collected with almost 5hrs going into the can for processing. Details Object name Andromeda Galaxy Object ID M31 Date(s) 11 and 12 October, 2017 Telescope Altair 115mm Camera ASI1600MM Luminance 89 x 2 min = 178 min or 2.96 hrs Red 16 x 2 min = 32 min Green 21 x 2 min = 42 min Blue 19 x 2 min = 38 min Ha 0 Oiii 0 Sii 0 Total time 4.8 hrs Frames 0 Processing PixInsight / Bias, Flats, Darks / Masked Stretch / Curves / ATWT I’m having fun zooming in to the different parts of the galaxy to view the H2 regions (star forming) that I was quite surprised to have caught in such numbers. These regions, swimming amongst the sea of big, hot blue stars destined to burn out quickly, are similar to our own Orion Nebula. Moving to the core of the galaxy and it super massive black hole the cooler, longer lived red stars dominate. Up to the left M110, another galaxy bound to Andromeda has resolved quite well – it can off look very pixelated – and nearby the big blue star who’s name I cannot find This galaxy is 220,000 light years across and contains a trillion stars which is twice as many as in our Milky Way galaxy. I think I now need a lot more colour data for this but its a start. David
  6. Thanks all - just to mention there isn't any Oiii in this image - I mention above that I was able to add Sii - I haven't been able to add any Oiii yet I will try to created an Oiii/Sii image when I get some clear skies as suggested :-) David
  7. Thank you I had a look at them in stf before combining and they looked as they should (ie monochrome) As for the proportions of Ha, Sii, Sii in combining them I used 100% for each - when I used other variations (ie Sii 80% + Ha 20% etc) the image came out green or blue depending on the mix I used. I got red with 100% in each channel with Ha, Sii, Sii so figured that must be ok? Still I expected to see brownish or blue accents instead of red. Thanks again David
  8. I took just 4x5min subs of Sii the other night before the camera just about hit the pier I've added these to the image above using Pixinsight PixelMath with Ha/Sii/Sii It's turned out pleasingly red but I'm not sure it's supposed to. I would've expected the red with Oiii but shouldn't Sii give a brown cast? Thanks for any advice David
  9. Yar - makes a bit of a difference LOL
  10. I subtracted the appropriate dark frames from this image and improved it a lot I think :-)
  11. Show us your set up in action at night.

    Clear skies finally - prepping for the pelican nebula ...and here's a shot from the scope camera while it's imaging IC 5070...you can just about make out the Milky Way :-)
  12. SynScan memory

    Sure - of course, sorry didn't think of that (there is a setting for that in another software package I use I think and has caused issues) David
  13. SynScan memory

    Hi John - go to Setup and check the hemisphere setting - think there's one for that.
  14. SynScan memory

    No problem John The idea of connecting the mount to eqmod through the handset is only useful if you intend to do any observing in my experience. I use it in this configuration as it means I don't have to disconnect eqmod cable from the mount and then connect the handset to control the mount while observing. You do need to get a different cable to run from the rj45 to the hand controller though - one that ends in the rj12 config to plug into the hc Something like this: https://www.firstlightoptics.com/astronomy-cables-leads-accessories/lynx-astro-rs232-serial-cable-for-sky-watcher-mounts.html I just find it easier to keep the hc plugged in and stuck to the side of the mount - so when I observe there's no cable changes. David
  15. Sorry - I wasn't clear in my response - I mentioned that I loosen them as otherwise the RA binds - but yes they are designed to move with the heads so you can use them to find objects IF you're not using your go to. Also, they're great for setting a good home position - rather than just eyeballing it - using a spirit level and adjusting for your latitude means you'll get to your alignment star a lot easier. David
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