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Robculm

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About Robculm

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  1. Hi, here's my attempt at the Coma cluster. ISO800, 3min subs, ~ 1h imaging time. I'm struggling with PEC at the moment, so only ended up with 1h of usable images out of about 2.5h so it's a lacking in as much 'data' as it should have achieved! PEC training on the HEQ5 is a bit of a joke (well it is when you're doing it by eye) to be honest. Looks like I'm going to have to invest in a guide camera at some point... It's a fantastic target though, thanks for highlighting this one. Many years ago I had a favourite poster of a galaxy cluster from the HST. They really are mind blowing hu
  2. I'm driving directly from the SynScan controller, no external apps & no guiding. Initially I did need to spend a lot of time getting things set up, levelling the mount, polar alignment, the longitude / latitude / altitude etc & in particular the 'cone error' caused me problems & took some figuring out. I do always perform the 3 star alignment routine, but everything seems fairly repeatable now, even I dismantle everything between sessions (I have permanently marked the mount position on my patio though!).
  3. Hi AstroMuni, Thanks . This was with 24 x 180s exposures at ISO400 (started with 30 or so, but deleted out the ones with elongated stars) with x20 each flats, darks & biases. I'm still very much experimenting with different exposures & ISO's etc, but from the handful of sessions to date & lots of single test shots at different settings, this worked out the best combination so far. I'm thinking to try and push the exposure a little longer ( 4 or 5 minutes maybe) in future, now that I've got the Rowan belt mod sorted (assuming that works to fix the star elongation pro
  4. I've seen some references to Sirilic, will definitely explore, thanks. HTH, ha, I chuckled at your politely suggesting I learn how to use the tools properly . You're absolutely right, lack of computer skill is indeed no excuse for laziness! Will endeavour to get a better understanding of the processes. Siril is a great piece of software & seems to cover a significant amount of the whole process, so definitely worth the effort I think... Regarding Startools, actually I did take a look, but almost ashamed to admit that I couldn't get it loaded up properly on my computer! ('Hardw
  5. Hi All, many thanks for your comments & feedback, much appreciated. I do find Siril really nice to work with, but looks like I need to understand it in more depth. So far I've just been putting the lights, darks, flats, biases in to one folder & linking that as the current working directory, then selecting the osc_preprocessing command, which runs & outputs the 'result'. I haven't needed to understand the conversion, sequence, pre-processing, registration tabs! HTH, when you say pre-process both nights (n1 & n2) what does pre-process actually mean? Is it just to sort
  6. Hi all, Since my previous post getting started with a smartphone (through a 200PDS with HEQ5 pro), I've made several 'upgrades' & spent a lot of time 'trying' to improve processing skills etc, but have several questions on which would very much appreciate any advice / suggestions. Firstly I've progressed to a DSLR (after much deliberation I went with a Canon EOS800d) & so far very happy :-). Have also just completed the Rowan belt upgrade as I was getting elongated stars on quite a lot of frames. Have yet to try it out, what with the weather as it's been! I will attach the la
  7. Ha, yes, there's certainly a lot going on there, it's definitely a great target to experiment with. After reading some of Roger Clark's (ClarkVision) articles, I guess my colours are all over the place, pink & blue is good, orange is bad! Will need to work on that... Have just ordered a DSLR, so very excited to get started with that in the coming weeks...
  8. Pretty happy with the result now. What do you think? At least there's some colour now & most importantly I can see a definite difference in the final stacked & processed image compared to the original single shot! Thanks again for all of your advice. Cheers, Rob
  9. This is where I'm getting to after more experimenting. I can get a reasonably broad stretch looking at the histogram, but there's still no colour showing in the image! Any idea what I'm doing wrong? Yes, StarTools looks like a good option, will explore that. I see there's also the option in Siril where you can specify what the image is and do photometric colour calibration, but it won't run with this image, I guess again because it's a smartphone, so the data is not as 'linear' as it would be with a DSLR... I'm thinking I should give up on this for now until I get a DSLR, then the ra
  10. Ha, I didn't realise it made any difference. But playing around with that, I notice that I've just been pulling down the high point, not touching the mid point... Looks like pulling down the mid point helps keep the detail Will play some more with this! I guess this is the problem with making adjustments but not really understanding the concept of what it's doing! Will keep at it... Many thanks, Rob
  11. Hi again, I managed to retrospectively generate some flats & re-stacked everything in Siril, definitely helps :-). I know M42 is tricky because of the high intensity in the centre & I've seen some reference to people blending shorter exposures etc... But on the edit you made, I notice you managed to stretch the image & bring out the colours without blowing out the centre! I'm really struggling with that, as soon as I get a decent width to the colour stretch, I lose more detail around the centre (in particular there are 3 stars you've managed to maintain to the r
  12. Thanks again for the advice. Will work on a better method for the flats & experiment some more in GIMP now that I know the data in the master is OK! Will also explore Darktable & Siril, thanks for those suggestions. Apparently 'prime focus' isn't possible with a smartphone, maybe because it has it's own fixed focus lens. A DSLR is definitely my next priority. Cheers, Rob
  13. Hi Alacant, Fantastic, thanks so much for taking time to look at the data. So it's 'in there', just my lack of processing experience huh! Can you give me a quick summary of what you did? I see you've stretched the colours, but how did you handle the background subtraction? I guess I need to watch more tutorials. If anyone has any good suggestions please let me know. Seems like there are different approaches to processing even within the same software. Thanks again, Rob
  14. Hi All, Many thanks for your comments. I've attached the TIFF, would really appreciate a quick opinion if it's the data itself or just my inability to process it! I've also attached the JPG phone photo for reference. Ha, yes, definitely used the RAW files for DSS, I did initially load all the JPG's as I didn't realise the phone stores both, with the RAW files being in a separate folder. Regarding the 'dark / bias frames', yes, could be, I did only put the dust cap on the telescope so it's possible light was getting in around the eyepiece. If it's the data, then I will put t
  15. Hi, I'm only my smartphone through the eyepiece at the moment. It's a Huawei P20pro, so reasonable as far as smartphones go, but for sure it's not equivalent to the DSLR approach... I took about 15 images + similar quantity of darks, flats & bias shots. As I mentioned, the flats were suspect, but the darks (same ISO / exposure with dust cover on) & the bias (same ISO, fastest speed, dust cover on) frames were good (I think)... Thanks, Rob
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