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geoflewis

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Everything posted by geoflewis

  1. Thanks yes, all of the above might contribute . Binning 2x2 was the same for all filters as without binning the scope/camera would be over sampled except in excellent seeing, even with the x0.63 telecompressor in train. I autofocus on filter change and monitor HFR as reported by SGP so other than the 4 hours of L shot one night the fairly frequent auto focus routine (~1 hour intervals for RGB) should keep the stars reasonably tight. However, what I do see during poor transparancy is that the Blue filter stars and sometimes the Green stars come out larger FWHM. I don't use DSS, but ImagesPlus and I now use Registar for channel alignment which has significantly improved the channel combination. The C14XLT is old school so suffers from coma, which is just another hurdle in the processing mix to overcome, though the Optec telecompressor lens does a pretty good job with that. I think the main issues are with the processing operator....!! Cheers, Geof
  2. Thanks Dave, I'll definitely check out the tutorial later. I'm somewhat a novice using PS, but the software I do use, ImagesPlus (IP), operates in a similar way, so I may be able to apply the methods, or even switch to using more of PS tools. Unfortunately there isn't a very large population of IP users, most of whom seem to be DSLR/OSC camera users, which is how I started out. Hence, finding useful IP tutorials for mono CCD LRGB is something of a challenge, so I'm largely self taught. I keep looking longingly at Pixinsight and APP, but hesitate to jump from one deep dark AP pool to another, as drowning in either will probably kill me..... Cheers, Geof
  3. Hi Shibby, I think I understand what you are saying, as I too see that 'stained glass window' effect. I've been back and forth with the sharpening of the L data, so I'm wondering whether that has been overdone. As I mentioned above I'm still learning the ropes of LRGB processing, but it's still very much a trial and error (with I fear too much error) process. Maybe I should revisit the data and see if I can improve the image. Thanks for the feedback, Geof
  4. Not so far away then...., I would be happy to get together some time to exchange ideas if you're up for that - perhaps send me a PM....
  5. Quote Translated: It's a pleasure to see you take advantage of my friend Geof! Its image is also very good and logically must have been made with the C14. They are great planetary imagers. Yes, all the main details of albedo are there in your picture, congratulations! Thank you Avani, I always welcome your feedback and encouragement, I learnt a lot from you the past few years . Best regards, Geof
  6. Thanks Simmo39, I feel as if I'm making progress with LRGB, but I get very inconsistent results. I find that the L can definitely overwhelm the RGB, so I have to back that off in the combination.I also have issues with varying star sizes when seeing and/or transparancy is variable over several nights. Certainly combining the 4 channels has become much easier since I started using Registar to aligning and pad/crop the stacked images, before combining them. Whereabouts in Norfolk are you, I'm in south Norfolk? Cheers, Geof
  7. Another superb image Avani and the detail on Ganymede is unmistakebly accurate. Thanks for drawing my attention to VPA, which I have just installed onto my laptop. I already had Virtual Moon, but hadn't seen VPA previously. I hope that you don't mind me riding your post, but I couldn't resist reprocessing and comparing the VPA graphic with the Ganymede image that I captutred with Jupiter just prior to opposition last year - the one very good capture session that I had all year..!! I think that the main features line up pretty well, especially the bright lava flows around the crater Osaris at the bottom of the image. Again many thanks for introducing me to this excellent planetary maps resource. Best regards, Geof
  8. Thanks Des, yes, I'm pretty pleased with it, though I'm sure someone with better processing skills than me could get a better end result. Cheers, Geof
  9. Having seen a few versions of M100 pop up on here the last couple of days, I thought I'd throw mine in the mix. At 11.5 hours it's just a tad more than Olly collected with his dual rig in one night (I wish), but it took me 4 nights of varaible seeing & transparancy. Captured with my QSI583wsg + Astronomic Type 2 LRGB filters through my C14XLT with x0.63 Optec Telecompressor, for an effective ~F7. I'm still learing how to combine LRGB, so will be interested in feedback from those that know better than me. There is still some vignetting showing in the right hand corners, so mabe I should crop those out, but anyway here it is.... Thanks for looking, Geof
  10. I usually split my time between monitoring everything from the warm room in the obs while I catch up on email and web browsing, with retiring indoors to watch TV whilst monitoring the obs laptop via RDC. If it's a really clear night I'll spend some time scanning with my 15x70 binos, or even doing some naked eye obs to see how low magnitude I can see. Often wish I had a 2nd scope to do some visual obs....
  11. Believe me, I've thought about it.....
  12. Hi Neil, I'm capturing subs on M100. Ive got an hour each RGB and now into my 2nd hour L - I posted an uncalibrated but stretched single L sub over on the 'so much for the clear night....' thread earlier, if you want to check it out.... I wouldn't come over to the dark side in a hurry ; I sometimes wish that I hadn't gone down the imaging path as I don't experience the same 'connection' imaging as I do on those occasions when I get into some visual observing. Look at tonight - just a single galaxy target when I could have visited severals 10s at the eyepiece.... I started my particuar AP journey when living in much more light poluted Surrey skies, so not so sure I'd have gone that way if I'd been living in Norfolk from the get go after I retired....!! Cheers, Geof
  13. Lovely report Neil and well done getting some more sky time tonight. I'm imaging which as you know is my preference, or is it (?) as I do like some visual connection to the eyepiece from time to time too. I only picked up on your quasar quest today when I saw that post from Sweden and really enjoyed reading the entire thread. Well done getting that one . Cheers, Geof
  14. Superb images Avani and I am completely envious of the altitude for both Saturn and Jupiter for observers in the southern hemisphere this year. From my location at 52N neither get much above 15° altitude all year - sigh.... Checking where these 2 planets will be the next couple of years I noticed that the run up to Christams next year (2020) should be spectaclar, with these 2 gas giants passing within approx 1/10th degree (6') of each other on 21 Dec 2020. They will easily fit in the FOV of my C14 with 12mm TV Nagler eyepiece at some x300 magnification for a few days either side of that in the SW around sunset. I'll be sending my request to Santa for an early Christmas present for a run of clear early evening skies and an iPhone eyepiece holder . Looking further ahead, by mid Feb 2021 Venus and Mercury both get in on the act in the early morning around sunrise. Mercury will be very difficult, but seeing the other 3 in close proximity for a couple of weeks as Venus first slips by Saturn on 6 Feb, then passes by Jupiter 5 days later should be worth checking out. They will be very close to the SE horizon (>5° alt) in a brightening morning sky, so no chance to get my scope on them, but a few minutes walk along the road from my house I have pretty much 0° horizon to the SE, so I may get lucky with visual / binocular observation. Cheers, Geof
  15. iMerge by Jon Grove available from Jagged Planet is also 'free' for non commercial use, with the option to make a donation if you want to... http://jaggedplanet.com/imerge.asp Geof
  16. 2 superb presentations, thanks for posting them here, as I was not able to get to the PAS. Geof
  17. Looks great, just downloaded to my phone
  18. Göran , that's an excellent presentation of galaxies. It's great to see them together and each in a wider field context. Cheers, Geof
  19. Very sad to have missed this; it was in my diary, but at short notice my wife and I agreed to house sit and take care of 2 of our grandkids down in Surrey last week through yesterday, while our daughter and S-i-L took a trip to New York. Very nice for them and of course lovely for us to spend time with the grandkids and catch up with with other family and friends near our old stomping ground, but the PAS was a casualty for me.... Sounds like it was a superb event, so hopefully it will run again next year. Geof
  20. Just saw this on Astrobin Olly, it's a cracking good image . Geof
  21. Thanks again for the suggestions and feedback. Yes, I've wondered about removing the stars to process the nebula and stars separately before recombining them. I've not used stratton (other than a trial some years ago, which I couldn't work out), but my usual AP software ImagesPlus has a star removal tool which I do use for some processing, but I had a lot going on with combining short and long subs with Ha, so didn't try it for this image.
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