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GraemeH

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GraemeH last won the day on March 22 2018

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About GraemeH

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    West Lothian
  1. Hi James, I bought one of these https://plater.manufacturer.globalsources.com/si/6008852269094/pdtl/Mini-PC/1162987701/Mini-PC.htm in 2017 (bought from Amazon but it's no longer available there) to test the concept. More recently I added one of these https://www.amazon.co.uk/gp/product/B07FXDW41T/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 for my other mount. Performance wise they are very similar. I slightly prefer the first one just because of its slightly smaller size, but the second one has more RAM and a slightly faster processor which I think is the reason that it's slightly faster for plate solving. Graeme
  2. I have 2 mini PCs - one on each of my two mounts. They run APT, PHD2, ASCOM and associated mount and focuser drivers, Sharpcap and Stellarium without coming under much stress. I have them set up to attach to my home WiFi and access them through Windows Remote Desktop from indoors. They are set to save images from my DSLRs to my OneDrive folder, so I can check the subs on my main PC without affecting anything during capture. I previously tried using a USB device server instead of a mini PC, and whilst it worked for the connection to the mount and my DSLR, I couldn't get anything from my guide camera (QHY5Lii). I suspect the device server simply wasn't able to cope with the bandwidth required for the guide camera. I find it extremely convenient to be able to head straight indoors after completing polar alignment and then get on with capturing images from my warm comfortable sofa. I realise that might make me something of a lazy imager, but I can't see the attraction of spending hours outside in sub zero temperatures.
  3. Was just playing around last night with some data from back in January. I know it's not to everyone's taste to have highly saturated moon images, but it was fun to see what I could get. Scope: Edge HD 8 Mount: HEQ5 Camera: Canon 6D unmodified Frames: 128 x 1/100s, ISO 100 Software: APT, PIPP, Autostakkert 3, Astra Image, Photoshop
  4. I vaguely remember having some issues with getting the QHY drivers to install properly, but it was some time ago and haven't had any difficulties since then.
  5. I use Photoshop, so I think you'd be able to follow largely the same kind of workflow in GIMP. Bear in mind that I'm still near the bottom of the learning curve with post processing, but my workflow starts by using levels to colour balance (shift the middle slider on each colour channel separately to make the histogram peaks overlap - don't worry about overhanging tails), raise the black point a little (taking care not to clip shadows), then use curves to stretch and bring out the nebulosity (a luminosity mask can help to stop the stars bloating too much). I keep checking for colour neutrality in the background, and repeat the levels adjustment to colour balance and the curve adjustment to stretch until it starts to show the nebula nicely without the noise becoming too much. Lots of small adjustments seem to give a better result than a few more aggressive ones. I'd love to see what you can get from the data.
  6. I was already using dithering for this (average dither was around 8-10 pixels). Maybe just not enough subs to smooth out the noise (only 24 x 300").
  7. I always enjoy seeing what other people do with the same data I've tried to process. Thank you for sharing your result.
  8. Thanks for the heads up - completed my request for a new trial license and it came through within about 15 minutes. Time to give it another try...
  9. I haven't - is that a kind of slimmed down version?
  10. I made the mistake of requesting a trial license for Pixinsight before I was ready to really understand what to do with it. I'm now reluctant to buy a full license in case I still don't get on well with it.
  11. Thank you - love the hint of blue that you've managed to get in the centre of the nebula.
  12. Sure - I'd love to see what someone with more processing skill than me can do with it. Attached is the uncropped, unedited stack. This is from 24 x 300", ISO 1600 with flats and bias (no darks - dithered after every frame), rest of the details in the first post of the thread. AHD Med KS.TIF
  13. Final reprocess (I think). Thanks to @serbiadarksky for the tips.
  14. Constant cloud cover has given me plenty of time to play around with this data a bit more. Have I improved the final result?
  15. I tried this very briefly https://github.com/vtorkalo/ASCOM.DSLR I found it a bit flaky and unreliable, but I really didn't spend much time trying to test it thoroughly so I'd hesitate to either criticise it or recommend it.
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