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Droogie 2001

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Everything posted by Droogie 2001

  1. I downloaded your TIF file and stretched it with a simple STF stretch in PixInsight. Then opened my post calibrated & stacked image of the Soul Nebula from my Star 71. Quick background. I am imaging a 3.17 Arc Sec P/Pixel so I am undersampling therefore I drizzle my data at x2. This makes my star rounder and smoother than if I do not perform a drizzle. I have attached some comparison images as accurately as possible despite the slightly different imaging scales. Images with blue circles are my images and red are yours. There definitely appears to be brighter concentration to one side of some of the stars, this is particularly prevalently on the brighter ones. The dimmer stars seem to be nice and round and the effect may not be as apparent as they are simply dimmer. If it was guiding I would expect this to be more obvious in that the entire ‘body’ of the star would looked stretched like grains of rice, here I just don’t see that though the effect gives it the impression of guiding issues. This extra brightness is really quite puzzling. Are you using a LP filter? Do you see this effect with other filters? I guess you are using the same filter with your Samyang lens where you don’t see the issue. Maybe worth checking this option as the lower focal ratio etc of your Samyang may be masking the issue? Like everything it will be a case of trial and error, not always easier when contending with poor weather. I would also definitely check your curvature as per my previous post as even with this extra brightness it does seems to be drawn to the centre? Hopefully some else can offer some suggestions…
  2. Hi Richard, I think I can see what you are describing. The star halos on the left hand side / top centre appear to point towards the centre of the image? I see less of this on the right hand side? Have you checked your field flatness / tilt? I have used CCD Inspector in the past to fine tune my flatness. I would recommend downloading this (I think there is a free trial period) and having a look. Its a great bit of software, it may not have anything to do with this but it would be worth a look even to at least confirm have flat your field is. I'll also try and have a look at your data to see if I get the same results.
  3. Nice images. I have a Star 71 (1st edition) and have taken images of the Soul Nebula. Though with different cameras my image looks similar to yours, I dont see any major differences in your stars compared to mine. People complained that the original Star 71 pinched stars but I have rarely found this to be an issue, if at all. Not sure that the lack of calibration files would cause the issue with the stars, in fact your image looks very nice even without any calibration frames. Are you perhaps stretching the stars more with the Star 71 as opposed to the very fast Samyang lens? Do you protect your stars with a star masks etc?
  4. Good to hear some progress has been made. They do however need to look at their current communication level. Fingers crossed!
  5. A couple of years back I unintentionally began viewing fireworks through my OTA. The colours and brightness to them were amazing.
  6. I use an OAG on my Star 71 and it gave me great guiding results. Never have any issues with finding guide stars though sometimes there are only three or four to choose from. With it I can manage 25min exposures with my humble Celestron AVX mount.
  7. Sorry to hear you are having issues. If you still have no success, then I would be tempted to mention than you are a member of a number of Astro Forums and that if the issue isn't resolved to your satisfaction then you will have little choice in disclosing their company name so that other people are aware of their current service levels. May seem harsh but you are out of pocket, no camera and have waited a reasonable amount time, hopefully it will not come to this... Communication is one area where a lot of businesses fail on and one of which is likely to cause the most stress to a customer. I know this from many experiences including a number of astronomy related ones. Hope you get it resolved.
  8. Congratulations on purchasing the Nexstar 8SE its a great scope, I know because I have one myself! Only use it for visual really now but its good for planetary and lunar imaging if you decide to go down that road. Here is a link to the user manual in PDF format: https://s3.amazonaws.com/celestron-site-support-files/support_files/1152120348_1106811069manua.pdf Good luck!
  9. Lovely image one of my favorite objects.
  10. Thanks Rico. I think the palette works. This is part of the bi-colour process I did not realise was so flexible. It became apparent early on that does need some testing before committing to a blend or else alot of work can be wasted. My first attempt at this was not very satisfactory.
  11. Very nice detail. I can clearly see the leaping cat.
  12. My first bi-colour narrowband image with my new OIII Chroma filter. Managed to add 4 hours of OIII to the existing 7 hours of Ha. As always I wanted more OIII data but I think I am done with the Heart Nebula for the moment. Having just processed Ha images for the last half of the year it took alot of extra time and effort to get back into processing colour images, just trying to keep that colour noise under control was a battle! I decided to go with a moody copper colour palette as I have imaged in LRGB previously and fancied a complete change of direction. Scope: William Optics Star 71 Mount: Celestron AVX Camera: Moravian G2-8300 – Mono Filters: Chroma 3nm 18x1500s Ha exposures (7.5 hours) @ -25c 9x1500s OIII exposures (3.75 hours) @ -25c Flats & BIAS Total: 11 hours Processed in PixInsight and PS.
  13. I managed to just get some for the Brighton Centre. The Ticket Master website does not make it very clear as to where the seats were, somewhere near the back but at least I got some. Have a feeling these will be sold out within the next few days / week!
  14. Thanks. Look like most are already sold!
  15. How did you purchase the tickets are they for 2019? I went to the site http://www.briancoxlive.co.uk/ to register and it said that the registration was now closed. There is a link to a Ticket Master site which relates to tickets in May 2017? I see that the Metro Radio Arena in Newcastle go on sale tomorrow, but I am looking for either Wembley or Brighton? Thanks
  16. Ha looks nice. Certainly more subs will help reduce any noise. I know from expereince going from 9 lights to 18 lights made a big improvement on this noise levels. One of the downsides I guess with taking longer subs is that there are less frames during the imaging session. Will be heading down the Bicolour route soon so will likely come across this issue as well.
  17. Hi and welcome. I live down the road from you in Redhill. The Light Pollution is pretty bad isn't it? What with Gatwick, London and the surrounding towns its little wonder that there is anything visible. I started on visual and progressed to AstroPhotgraphy. Take some heart that AP is possible in the area and a number of other SGL members in the area manage to get some very decent results. Further ahead in your AP journey will be Narrowband which cuts through alot of the Light Pollution. Just be prepared to have your bank account emptied... There is another Astronomy club nearby in Horsham which maybe of interest: http://www.horshamastronomy.co.uk/ Good luck!
  18. Do you have the Ha copy of the image, it would be nice to see this? I only have experience of combining LRGB images so cannot offer any valid points on the Ha & LRGB process. My thoughts are that the stars are a little too saturated, I would also expect to see more detail on a 14 hour image. Having looked at your AstroBin site I see you are getting very nice results with Ha only and other combined Ha & LRGB but I think this image may still have more to offer?
  19. I tried it and found calibration difficult. Despite all efforts I could not get any consistent guiding, probably me rather than the application Went back to PHD. Sorry not much help!
  20. I agree this is a stunning image, the colours suit the target very well. I am about to get a OIII 3nm filter to start bi-Colour imaging so this is interesting colour palette.
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