Jump to content



  • Posts

  • Joined

  • Last visited

  • Days Won


Everything posted by lensman57

  1. Many thanks Dave for your reply and advice. I took the chance and went for it and it sort of paid off. I binned the Oiii data and then drizzled it in PI to match the Ha and then did the combine in StarTools. I have posted the result in the imaging section. My problem is that I only live a couple of miles from the Airport by a busy and well lit dual carriage way so the LP is sort of Manchestertastic. Regards, A.G
  2. Thank you Paul and Olly. I am quite chuffed at all your kind comments. Considering that I was almost ready to chuck the Oiii data out last night ( I only took the Bin 2 X 2 calibration frames early this afternoon ) I am glad that I persevered with it. Now if I had the lost 2.5 hours of Oiii imaging time added it may have been a more presentable proposition. Regards, A.G
  3. This is awesome Sara, the FOV, depth and level of detail is unbelievable. I can see the beginning of another image of the day at Astrobin. Regards, A.G
  4. Hi, Taken on the evenings of 11th and 12th of Aug. The Ha data is reasonably strong but the OIII was cut short due to a multitude of reasons last night including the sensor freezing up, high clouds and the mount refusing to align for over an hour. Ha data: 17 X 900s Bin 1x1, Canon 200 F2.8L with a 58mm front aperture mask, Astronomik 12nm Ha and Atik 383L+ Oiii data: 9 X 900s Bin 2x2 , Canon 200 F2.8L with 58mm front aperture mask, Astronomik 12nm Oiii and Atik 383L+ Stacked and aligned in PI with minimal processing, mapped Ha, Oiii, Oiii to R, G, B and blue bias shifted in StarTools. Size reduction and HLVG in PS and no other processing or colour correction as yet. I will get my head together to see how to progress from here if at all possible. To be honest I am quite pleased to get this from a light polluted back garden in Manchester with minimal data. Regards, A.G
  5. Hi Chris, Thanks for your reply. You are absolutely correct in saying that this one is a super faint target. I have no choice but to use my 383L+ and a Canon 200 F2.8 L which will have a front aperture mask of 58mm plus an Astronomik 12 nm Ha filter to start with and see what happens. This one is so large that I need every micron of the sensor to fit it in. Regards, A.G
  6. Hi, I have been looking at various examples of the above nebulae for over a year now and I am still none the wiser as to what exactly is the minimum integration time to bring these ultra faint nebulae out of the background. I have seen some eye openers with as little as 8 hours of exposure and I have also seen some decent but totally unconvincing attempts with over 40 hours of integration. I know the , more the better but in the case of some of these images it seems that the more the better is not really any better. A.G
  7. Another wonder of the southern skies. Excellent image. Thanks. A.G
  8. A very beautiful and interesting object and image. This is way beyond the capability of the average UK based imagers. Interesting to note the unusual, Blue, Green, Yellow and Ha wavebands used to image this with the large research telescope. Regards, A.G
  9. This is looking superb now Chris, really lovely. A.G
  10. This is great Lee, lovely star colours. A.G
  11. I love it, very subtle and clean. Regards, A.G
  12. Hi, I had no plan to image last night but took advantage of a rare long clear night and decided to do a wide field of the Tulip. Being lazy I went for a modded DSLR. The image is nothing to write home about but this is the only image of mine that has had no NR applied to it either in PI or in PS in any shape or form. I also took care to make sure that the Darks were a good match to the lights, the entire frame sets used are all within 3C of the lights. The big problem in processing this image was how to control millions of stars in this region and trying to separate the nebulosity over the entire area from the stars. I really did miss a good strong layer of Ha here. 16 X 900s subs, Baader Modded canon 1100d @ iso 1600, Astronomik CLS clip, WO Star71 and HEQ5. APT, PI and PS. 101 Bias, 35 Flats and 15 Darks were used for calibration. Thanks for looking. Regards, A.G
  13. Thanks to everyone for your kind words they are really appreciated. Hi Lee, thanks mate. If the opportunity arises I might add to this but I am not holding my breath with this lovely summer weather we are having. This was my third attempt in the last few weeks to collect data on this target and even on this occasion I almost packed it up because of clouds but I decided to leave the mount and the scope out for an hour just in case if it cleared and it did but I lost an hour of imaging time . Regards, A.G
  14. Thanks Martin for the pointer. Regards, A.G
  15. Hi, The belt drive is not all that has been made out to be. The budget Synta mounts like others use a worm gear system as well as the cogs to run the mount. A belt drive conversion will only take out the slop in the cogs and the back lash in the worm gear train still remains. It does improve the pointing accuracy to some extent and will also make the mount quieter during the fast slews so you are not at a loss with your EQ5. If you decide to take out the slop in your gears by tightening them you should still leave a very small amount of free movement between the gears. If totally tightened up the stress will eventually cause the gears to fail. You could use a small amount of high pressure grease between the gears to negate the effects of backlash and to help to make the mount sound quieter and smoother. When I had my EQ5 I found out that excessive play in the worm gear train was the main cause of getting elongated stars in particular if the polar alignment of the mount was not spot on as the guiding software was trying to correct both the RA and DEC with little success and ending up over correcting and then trying to pull it back like a YoYo. Regards, A.G
  16. Depending on the filter you are using you add about 1/3 of the thickness of the filter glass to the optical path. Your star shapes suggest that your sensor is too close so you need to experiment with increasing the distance by 0.5mm at a time or invest some serious $ in CCD inspector software. I think the trial is free and fully functional for limited period. Regards, A.G
  17. Thank you for taking the trouble of looking my query up. I will follow the links you have provided. I am very surprised that CDC can provide catalogues to stars of magnitude 19 and dimmer but has no viable catalogue for some of the most interesting objects of the deep sky. Regards, A.G
  18. Hi, Does anyone know of a complete SH2 catalogue and how to install it in CDC. I am sure that I use to have it listed in the search dialogue in one my previous laptops by default but it is no longer showing in my new installation. thanks for your help, A.G
  19. Congratulations on this brilliant image. I have always suspected that OU4 would be within reach using a weaker Oiii filter than the Astrodon 3 nm Oiii and you have proved it. OU4 It is by far one the most difficult DSOs to image due to it being ultra faint. Very well done. Regards, A.G
  20. Good morning to all, The only sure way to keep your computer away from spying by third party software is to disconnect it from the net. No internet. As it is, already every URL typed into a search engine is recorded and reported by benevolent free search engine providers such as Google and the like for the sake of information gathering. I have no idea what these so called updates are or were that are mostly downloaded without us knowing. I for one would not be willing to upgrade from win7 to any other OS as I am sure a lot of my drivers will not work properly. Regards, A.G
  21. Lovely and subtle colouring and processing. Very well done sir. A.G
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.