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mark7331

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Everything posted by mark7331

  1. I'm amazed at the level of detail you've pulled out of M31. Wonderful. I don't know it this is useful but all I can suggest is when recently taking M42 I took 2 minute exposures and the core looked pretty blown out but when processing with PixInsight I used a HDRWaveletTransform to reduce the contrast on the core. The result was the detail of the outer nebula was clear and the core was visible with detail without a whitewash. Here's a quick run of your core image with the wavelets run. Hope it helps Mark
  2. What a beautiful image. I love the colour balance and the depth of the nebula. Truly wonderful. Mark
  3. Thanks everyone for your kind comments. Nibor that's amazingly high praise. Thanks. I really enjoyed capturing this especially with the O3 and Ha. I hadn't imaged M42 before and those two hours before dawn were so exciting. I can't wait to get out there again. Thanks again. Mark
  4. Glad to help Brian. I've used the UHC-S L in my 3" refractor and worked just fine. I've also used it on my 12" newt and the view was fantastic so I don't know why it would be recommended for 4-10" only. Just FYI the one I have is "Baader UHC-S L booster" number 2458275 and I got hold of it from Harrison Telescopes (Baader UHC-S L Booster Filter 1.25"). Mark
  5. Tony, Kh3ldar thanks for that information. It's all getting clearer. Cheers Mark
  6. Thanks for looking guys. I've had trouble with collimation and have found that my cheepo laser collimator is in need of collimation itself. Time to upgrade I guess. I've had a look on FLO for coma correctors but they seem to be aimed at DSLRs. Are they all suitable for CCDs and will I need adaptors? Sorry..so many questions. Thanks for your help. Mark
  7. Wow. That gave me a tingle down my spine! Amazing.
  8. Ok chaps here's the whole thing Cheers Mark
  9. Cheers prokyon. It certainly is worth collecting more data.
  10. I've used the Baader UHC-S (L booster version) for both imaging and visual and found it to be really useful in boosting contrast. It certainly enhanced the view visually. As far as I understand the difference between visual and imaging filters is that visual filters are all about reducing LP and enhancing contrast where as imaging filters are really about selecting a range of light to capture - be that broadband or narrowband. Mark
  11. Agreed. It's the first thing on my list after a crop. FYI I do my crop during Image Integration in PI using a preview to get the right size. I like Olly's method best though.
  12. Hi all. I need a bit of help in working out exactly what this is. I've been imaging during the recent clear skies and my guiding has finally been great but I've noticed in the edges of the images the stars are elongated and pointing into the centre. I'm not entirely sure if this is coma, poor collimation, both or something else... so any advice would be really appreciated. My imaging scope is a newt and I've attached the top right and bottom left from one of my recent images so you can see what I mean. Thanks in advance. Mark
  13. Top class Peter and incredibly inspiring as always. Lovely image.
  14. Wow! That's a really beautiful image. Lovely deep detail and a 3D look. Fantastic. Mark
  15. Adam, sorry you're still having trouble. How long are the gaps between the peaks in DEC activity? Do you get, for example, 5 minutes of smooth guiding then a blip? Maybe you're right about the mount but I wonder is there a way to test it? Could you, for example, use an artificial star and see when (or if) the mount misbehaves? If you can get 5 minutes of good guiding then maybe that's acceptable for the mount... Mark
  16. Hi everyone, Since we've finally had some clearer nights I've had a chance to practice my guiding methods and I feel like I made some reasonable progress on Saturday night. So at midnight I started work on M33. By 4am with four hours of red in the bag I decided to have a look around and take some quick shots of something else (as you do). I looked up at Orion who was smiling down so it seemed only fair to have a crack at M42. I've never taken any images of the Great Nebula before and it was an amazing sight. So until 6am I took 2 minute subs of Ha, OIII, red and blue. I didn't really choose to use OIII but to be honest it was already in the green slot in the filter wheel and, at 4am, I wasn't about to change it - I'm glad I didn't. I've processed in PixInsight using R,OIII & B as RGB and then applied the Ha as luminance. I'm going to try lots of other combinations with the data. Taken with Atik314L+ on the SPX200 (Field of view:34'x25'). Flats & darks were applied. I think that I need some kind of coma correction and a good laser collimator (mine's a cheepo). All comments at all and any advice would be very welcome. Thanks for looking, Mark
  17. mark7331

    Work in progress

    These are examples of differing approaches to guiding and image processing with the aim of producing a handbook of techniques so I don't have to guess any more.
  18. Ouch. I hope it's not mechanical. Just a thought Bamus but have you tried, once calibrated, reducing MxRA and MxDEC. Maybe PHD is over compensating? Try 500 ish? Mark
  19. mark7331

    M27

    Very nice Colin. It's a great image and a brilliant start. The second version after PixInsight is really good. Mark
  20. Congratulations on your first image! Looks pretty good to me. As you say the processing is a little off but I don't think it matters at all. You have nice round stars and lovely detail. Brilliant. Mark
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