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Laurin Dave

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About Laurin Dave

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    Star Forming

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    Astronomy, Cycling, Physics, Guitar, Travel, Caravanning
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  1. Fabulous image Barry, great detail and lovely colour. Dave
  2. Such a lovely idea and really well executed, well done Carole. Dave
  3. Hi David There are Flat Field images in the Atik 16200 manual that don't look too dissimilar to yours (or mine).. ie darker at the top than the bottom (because of stretching and clipping) I'd speak to them if you haven't already, maybe its a characteristic of the chip. Dave
  4. Hi David Looks just like mine from my SX-46, the difference between the un-stretched darker corners and the average is about 1.5%. They seem to work fine. Dave
  5. Very nice.. you can reduce the magenta halos in Pixinsight by inverting the image, using SCNR green (experiment with the %age amount, I find around 70%works well on my images) to remove them ( they've turned green) then re-invert. Its because the Oiii (Blue) and Sii (Red) stars aren't as tight as the Ha ones.. (I think) Dave
  6. Certainly did.. significant improvement in resolution in the galaxies Dave
  7. Great image, and looks like you got your flats issue sorted. Well worth the time invested. Dave
  8. Is your camera mono or colour ? Mine is mono
  9. I have a shutter camera and use a Huion tracing panel and between 2 and 10 sheets of A4 typing paper to get exposures of 5-15 seconds for my flats .. 30000adu works a treat. takes a while to do all but no trace of shutter lag Dave
  10. Lovely image, great detail. I do like to see the galaxies in a wide field context. There's plenty of targets coming up that'll look great with this combo, M81 and M82, Leo Triplet and Markarian's Chain to name the most obvious. Dave
  11. Graham, here's a comparison between ASI1600 (3.8 micron) and SX-46 (6 micron).. Just 1 hr of Ha on the Rosette for both and same stretch on all. Two versions of the 6 micron, one at native (SX-46comp2 - the last one) and one registered to the ASI1600 data ie pseudo 3.8 micron (the middle one), which when you pixel peep gives rounder stars. I guess you could also use Pixinsight's Drizzle to do this. Pixinsight also tells me that the SX-46 SNR is much better. Dave
  12. Hi.. I’ve used both an ASI1600 and SX-46 on my Esprit 150 (0.78 and 1.15 “/pp). If you pixel peep the stars are clearly squarer with the SX-46 but I don’t think there’s any real detail missing. If my seeing was better then maybe, but not from Berkshire. The CCD data is also somewhat easier to process, less of it and much cleaner. Another thing to consider would be whether you’re guiding is good enough to enable sub arc sec resolution. In your situation i think I’d wait and see how my current camera performs. HTH Dave
  13. Marvellous image Gav, I did this a few weeks ago through my Esprit 150 and posted it on here so that’ll give you and idea of what a change of scope will give you. Other than that my only suggestion would be move to Spain.. been thinking about that myself. Dave
  14. Yep... it’s critical for being able to get both focus and star shape. Dave
  15. Hi Goran, Well done on getting it all up and running and capturing a marvellous first light. Being no expert on this stuff I've been playing around with PHD settings trying to work out what's best, currently using 3 or 4 second exposures, RA aggressiveness 70% Hysteresis 30% minmo 0.2, Dec Resist switch, minmo 0.2 and 100% aggression. Seems to work ok.. 0.5"rms on a low altitude and 0.3" rms when overhead, certainly good enough for the 1.2"pp I'm imaging at. Seems sensitive to balance and cable management which I keep tweaking, at one point the corrections on both RA and Dec were all one way, adjusting balance corrected this and guiding improved. Be interesting to see what other Mesu/PHD users are using. Somewhat envious of your SQM. Dave
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