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SamAndrew

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About SamAndrew

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    Star Forming

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    SW London
  1. I wouldn't normally complain about a discount, but isn't it misleading and against regulation to say "Was £1890, Now £1590, Save £300" unless the product has actually been for sale @ £1890 (on the CEM40)
  2. Another Ha image from January/February. I didn't really have a plan when I started; collected about 7 hours of H S & O data for the central region, and then thought I'd experiment with the mosaic planner in SGP splitting the nebula in half, top and bottom, and captured another hour of Ha for each section (hence top and bottom edges are more noisy). I've stitched it all together with Astro Pixel Processor, which has blended it together nicely but seems to have warped the frames a bit so the stars haven't stacked very well in the centre resulting in what looks like a bit of trailing which isn't in the original data. Need to play with the settings some more or try a mosaic with already stacked frames. Will create a version with the S and O data at a later date. Integration ~4.6 hours Subs 5 minutes @ Gain 300 with the ASI 1600mm @ -20C Star 71, AZ-EQ5 Re sampled to 50%
  3. I believe you still need to guide to get the best out of the 10Micron GM2000, If you look at the results from Barry and Steve you can see they guide theirs when imaging at 980mm with the TEC 140.
  4. Two pane mosaic captured under two full moons captured on January 20th and Feb 15th, two hours for each section with about a 50% overlap, Decided to get Astro Pixel Processor and very happy with how this has come out. I've got a few more mosaics to stitch together so looks like this will be a very valuable tool. Minimal processing in PI, seems I've done something odd with the stars as the bright ones have dark spots in the middle now. Star71, ZWO 1600mm, 5 minute subs at gain 300.
  5. Some nice faint detail picked up in the galaxy Think I prefer the colour in the first. Curious in the advantage of binning and then drizzling? does this yield any improvement over not binning in the first place?
  6. Not sure I'd suggest anyone should leave thousands of pounds of equipment unsecured in their garden.
  7. I thought my first LRGB came out quite well considering my sky is Bortle 8. This was without any additional light pollution filters, just the standard ZWO LRGB filters.
  8. I started off with a a big 10" F4 newt on an NEQ6. It took a fair amount of time to setup because you had to strip everything apart between sessions (Typically 45 minutes from memory). The guiding on an NEQ6 wasn't really sufficient, although perfectly acceptable for a newbie. I wouldn't say it was hard, mine didn't require any modifications (to my newbie eyes at the time). The field of view was a challenge, the majority of popular nebula targets won't fit on a DSLR sized camera chip, which is why I later got an 8" F4 as well. I took it to a few remote sites and wind was always an issue. If I did it again I would have got the 8" over the 10". I've now got a 71mm refractor which is much more pleasurable to use; setup time is typically 15 minutes from opening the back door to starting the first image, so I'm far more likely to be in the mood to use it.
  9. Seems there is useful recent data here on the CEM-60 - the last couple of pages https://www.cloudynights.com/topic/618736-got-my-new-cem60-today/page-7 In summary, it seems the non EC version will guide between 0.3-0.5" RMS total; which makes the benefit of the EC version very questionable. For £1650 I'm very tempted
  10. Original post edited to include latest revision - Reprocessed the luminance as I rushed it the first time after spending ages on the RGB image first. Started with some Deconvolution which I completely forgot the first time and then payed much more attention to the noise levels in the background by improving the masks for each process. I then desaturated the background on the RGB image a bit to address the colour patchiness, so this time I didn't need to do a synthetic flat in Photoshop. Night and day difference! much happier with that. Next step will be to see if I can drizzle the luminance data as I have about 70 subs and I'm quite under sampled.
  11. You use an uninterrupted power supply (aka a battery) that can power the roof and mount long enough to shut everything down in the event of the internet or mains power failing.
  12. Should work, you'll want the field flattener, but even with that you'll probably need to crop the corners.
  13. Thanks for the feedback, I have run SCNR on the green again (I probably did this a bit early in the processing) and adjusted the balance and agree it looks better. I have also cropped it a bit further to remove those stacking artefacts without loosing any interesting detail. I will have a go later with your synthetic flat technique Andy, I had tried something similar but without the Gaussian Blur or adjusting the Offset on the opacity. Wasn't aware of Arp's loop! so have learnt something else from the image; you do wonder what is a very faint feature and what is just a patch of noise when processing. The stars could use some more attention, I can see I've introduced some ringing at some point, but think I will try and get some more colour data before going through the whole process again.
  14. Thanks yes I can park my mount up when completed and resume from the parked position so that shouldn't be an issue, although the AZEQ5 does have encoders. I've got 90% of what I think is required sorted out, I currently run my setup from inside using teamviewer. Final piece of the puzzle is a new dedicated PC and test powering it on remotely.
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