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About StevieO

  • Rank
    Star Forming

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  • Location
    Taunton, Somerset
  1. Got a couple of hours and could've got more but working tomorrow so bed calls. This is a first pass of what I got (Eastern Veil). StevieO
  2. Taunton good at the moment. Have had an epiphany recently - not chasing the weather any more, mount semi-permanently set up and PA in back garden, so can get going at a few minutes notice, like now. Keeping a sharp eye on band of rain on Met website about 20 miles to my SW. StevieO
  3. Definitely the most challenging conditions I've kept going in, and only because it was first light for the new scope. Peeking through and between the clouds I managed to get 90min of usable Ha and Oiii subs. Here's a first pass at NGC 6960 in bi-colour. Really pleased with the scope, it will be fantastic in good conditions. StevieO
  4. So I paused my imaging run and was about to pack up, when, blow me, the clouds seem to have gone for the present, so I'm gonna soldier on. This is why I got a quattro - with a 0.9 coma corrector the imaging at F3.6 should be fast enough to grab a few subs between the clouds. StevieO
  5. Yup, I can see your drizzle on the Met Office website, hope it's going to miss us - oh wait PHD's started bleeping at me again, better check it out! S
  6. According to Meteo Blue the skies round Taunton should be cloud free for hours, but that just ain't the case. However, couldn't wait to give first light to me new Quattro 8" so I set up and so far it's mixed. Some good patches interspersed with 'star lost' reports from PHD. Nevertheless I'm gonna persevere, got about 30min worth of Ha on the Western Veil so far...... StevieO
  7. Thanks for that. I think somewhere in there is the answer. Looking at my flats I can readily believe it could be down to internal reflections, and I will try adding a 5mm spacer between ccd and filterwheel. I'd have to think long and hard before trying to paint the inside of the FW matt black, though! Regards StevieO
  8. Hi Wim, thanks for your response, They're Baader 36mm unmounted 8.5nm. I hadn't noticed the borders before either. I've now over-stretched the Ha and Sii filters and they also exhibit the same thing but to a much less noticeable degree. 2 possible causes spring to mind: I'll check that the retaining clips aren't too tight, causing tension in the filters It may be that even 36mm is too small for the 383L chip. Stange that I didn't notice this before my long break from imaging. Cheers StevieO
  9. Hi all, Since taking up imaging again after a long break I have found that my Oiii flats are exhibiting a circular feature on the left hand side (see the attached image). Doesn't happen with Ha and Sii. At first I suspected my filter wheel to be at fault, eg. not centring the filter in the FOV, but I've checked it and it's fine. It's not the shutter on my Atik 383L as the exposures are 5 sec. I've stretched the image more than usual in order to show the feature clearly. Any ideas would be gratefully received. Cheers StevieO
  10. That's been very helpful, thanks. Taking everything into account, I think I'll stick with what I've been doing, which is 50% Luminance and 50%RGB. I think after all that creating a 'false' Luminance from a greyscaled RGB image will be noisier and less detailed than otherwise. S.
  11. Wow, my gob is smacked, I wasn't expecting so comprehensive a reply, thank you! I was especially struck by the improved SNR to be gained from capturing genuine Luminance subs, and if I interpret correctly, that adding a greyscale copy of an RGB image as luminance is likely to increase noise, rather like stacking multiple copies of the same sub together. The last part about including RGB data in the Luminance stack was interesting, I will give that a go and see what happens. Thanks again! StevieO
  12. Hi, I'm whiling away the short cloudy nights by trying to improve my processing skills. I have been re-watching Anna Morris's excellent video tutorials https://www.eprisephoto.com/videofiles/h1b3af346#h107c11a6 She has a technique whereby she creates a luminance layer by combining R, G & B into an image, copying it and turning the copy into a greyscale image. It would mean that all data captured would be represented twice in the processed image (once in the RGB and once in the luminance). My question is, how would this compare with shooting separate luminance subs in terms of capturing detail? It would certainly mean more time spent on RGB capture if no luminance subs were needed. I'd be grateful for any thoughts. Cheers StevieO
  13. I too have been thinking about where and how to get away from the UK clouds. A simple solution would be to go somewhere where they have all the equipment you may need and use theirs, like Astrofarm or Les Granges. My trip to Les Granges (Hi Ollie!) a few years ago is still green in my memory and I still have images on my wall from that trip. More adventurously, go to somewhere like La Palma or Tenerife, and take your own gear. Easyjet fly to both places and, out of season, accommodation costs would be low. Then you can rent a car and drive up into the mountains and set up. My problem with this approach would the amount of gear it would be necessary to take in order to take full advantage of the pristine skies: mount/tripod, OTA, laptop, cables, camera, power supply etc etc. - enough to cost a small fortune in excess baggage fees. I'd be really interested to hear from anyone who has taken this approach and how it turned out. All the best StevieO
  14. Thank you, yes, 3292 works , and once again APT sends the co-ordinates to CDC which centres the location for slewing. Plate solving was something I'd previously shied away from but now that I'm getting it to work I'm anticipating being a lot warmer next winter! Cheers StevieO
  15. Hi, I'm returning to imaging after a break and have decided to include plate solving as part of my re-education. I've followed the steps of this excellent tutorial and am now in a position where I can get APT and CDC to slew to any named object, and also to successfully plate solve using ASPS and PS2. Initially when I pressed the 'Sync' button APT would give the co-ordinates to CDC, which would centre the object in its screen and I could slew to it from there. However, for some reason all I get now when I click 'Sync' is a message in the log that 'Cannot sync to co-ordinates. Exception occurred)', although I can manually input the co-ordinates into the GoTo section and it will slew perfectly. I could settle for that but it's become a challenge. I wonder if the Planetarium setting is correct in APT Settings? The 'Port' setting for CDC defaults at 0. Should that be something else or is this another problem? Any ideas gratefully received. All the best StevieO
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