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Everything posted by steppenwolf

  1. This is pretty normal for this particular sensor although my 'columns' disappear as soon as I cool my (QSI 683) one to -20 degrees C. Dithering while imaging and ideally using PixInsight's 'Cosmetic Correction' algorithm before stacking will remove these noisy pixels well and you'll get some great images then.
  2. High or low, it is certainly good enough for government work and I reckon an old amateur like me would be happy with it too!
  3. Yes, this could easily be modified to accept a Bahtinov mask instead of a Flats panel
  4. Can't be sure that mine was a Charles Frank but it would have been 60 years ago that my parents bought me a black cardboard tubed refractor via the 'Look and Learn' magazine. I remember well that I had to be VERY careful when focussing inwards as it was all too easy to blow the single lens off the front as the white plastic retaining ring was not a great fit!!
  5. This would be my choice as well as I have found this camera to be an excellent all-rounder and that tilt screen makes is very much easier to view at the often strange orientations that we astronomers get involved in!
  6. Tee hee - that should, of course, have been 16Gb RAM
  7. I'm completely with Olly on this However, I DID buy a new PC and as this coincided with a desire to try PI, I had it specced to meet PI's requirements which meant an Intel i5, Windows 10 (64bit) and 16 Mb Gb RAM - not exactly a really high specification but it works very well for me so this doesn't need to be silly expensive. I wouldn't rely purely on PI but I do think that PI and PS combined in your workflow is a great way to proceed, PI for calibration, alignment, integration and deconvolution (perhaps some noise reduction too) and then straight into PS for the 'interesting' stuff!
  8. Yup, almost perfect. It could be argued that the bisecting line is a FRACTION high but to be honest, this really is close enough
  9. Seriously impressive and such dedication by Metsavainio. This could be such a useful reference work for 'what shall I image this week?' type questions!
  10. Cracking image, Richard with beautifully coloured stars and great detail in the nebulosity. It's a lovely, full field of view.
  11. Sorry, Mike, I am late to this but in your circumstances, this is the right decision - I only have the shutter automation as I run fully auto. You'll love the Pulsar Dome - it really is nicely made.
  12. Thank you, Peter, I'm pleased you like it! Oh the joys of narrowband, Martin, allowing you to choose any colour you like just to get the contrast you need! I guess that means you like it, John I wasn't aware but will have a look into this - thanks for the heads up. Thanks, Adam, I do love narrowband colouring - such freedom to explore! Thank you, I'm delighted that you like it.
  13. No problem, Craig. This was it:- 1. Process both Ha and OIII in PS3 to produce similar brightness/contrast mono images 2. Generate a standard HOO image (Ha mapped to Red, OIII mapped to Green and Blue channels) 3. Use Noel Carboni's action 'Synthesize Green' to generate a unique Green channel 4. Use the Hue/Saturation tool to set 'Red' data to a more 'Gold' colour 5. Apply the usual 'Gold/Turquoise (SII/Ha/OIII)' adjustments I did some final tweaks using Levels and Curves to achieve the brightness/contrast I wanted Hope that helps.
  14. I pondered this very point for some time but decided that I rather liked the 'curtain' of filaments across the top left hand corner of the image!! I need even MORE magnification to do the Leaping Leopard justice! I'm with you there, it has been a terrible winter for imaging so I am delighted to have at least something to show for it .......
  15. The Rosette Nebula Description Also designated as Caldwell 49 and Sharpless SH2-275, the Rosette Nebula constitutes several different objects and this central core region includes NGC 2237, 8, 9 and 2246. Closely associated with the nebula is the open star cluster NGC 2244. This beautiful nebula is well named as in RGB images, it does indeed look like a rosette although in this version which comprises 3nm Hydrogen Alpha (Ha) and 3nm Doubly Ionised Oxygen (OIII) filtering, I have chosen a colour palette that emphasizes the detail rather than trying to emulate a standard co
  16. I was in this fortunate position three years ago and my forever telescope was also for imaging. My budget may have been less than yours if you are now thinking ‘Tak’ but don’t just be swayed by the brand and do your research carefully but for what it’s worth, my forever telescope turned out to be an Esprit 150 and it was a really good decision. I also considered the Esprit 120 as it too is an excellent imaging ‘scope but in the end, as this was ‘forever’, the 150 won through! I have had a Tak (actually two) and I don’t get what all the fuss is about!! Good luck with your research!
  17. I think this is a great effort - congratulations on your progress so far. Apart from the vignetting, the two images are very much what I would have expected with the exposures that you took. The Horsehead Nebula is a rather dim object and the 60 second exposures were really pushing your luck on this one! Things would get a lot more interesting if you pushed this to 5 or even better, 10 minute exposures and lots of them!
  18. Interesting comparisons, thanks for posting. To me, the f2.8 stop-down is certainly worthwhile based on your tests. It would also be interesting to see the results of using an f2.8 aperture mask versus stopping the lens down under aperture control. I really ought to get myself one of these lenses!!
  19. I used my 12nm Ha filter in a 200mm f2.8 prime lens but I guess it’s worth an evening’s experimentation to see how it pans out! Yes, built in hubs do help with the inevitable cable tangle - I have quite an impressive ‘umbilical’ leading to my mount head and have had to go to some great lengths to avoid friction!
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