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GordonH

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Everything posted by GordonH

  1. Hi I haven't posted in a while as I have been out of commission due to having major surgery on my right knee (TKR) and didn't want to risk hobbling around in the dark on crutches and tripping over cables etc. I have been able to do some imaging over the past couple of months though. This is an image of part of IC5070 taken with my Televue NP127/FLI astrograph but using a Microline x814 camera in place of the PL16803, FLI provided me with an adapter to convert it to ZTA fitting and top take up the extra back focus but I will need to have some shims made to ensure it sits square to the focal plane as I suspect it isn't perfectly square at the moment (this is due to the way it fits) Exposure times are 18x10 minutes each for Ha, OIII and SII The large size image can be seen at the following link http://m5.i.pbase.com/o9/29/869929/1/160320905.Tepz8fPZ.IC5070HST2000.jpg Best wishes Gordon
  2. Hi Paddy Thanks for the comments, I don't use binning and never have done for the image acquisition whether for RGB or narrow band. I only use 4x4 binning for framing as it shows up the nebulae in Ha with 5 second exposures so framing is easy with continual exposures in Maxim DL Best wishes Gordon
  3. Hi Normally I do narrow band due to light pollution unless the subject is high up near the zenith and there is no moon. I thought I would have a go at M78 as it is a subject that has always appealed to me, the problem being that I can only image it once Orion has cleared my house and by then it has already gone past its highest position in the sky and I am shooting directly over houses where the bedroom lights are on until very late into the night so conditions are far from ideal. Because of this I have had to crop the image considerably as there were two large "light flairs" in opposite corners of the image where part of the data had to be shot when the subject was relatively close to a lit bedroom window. This was taken with my Televue NP127/FLI PL16803 astrograph on my Paramount ME Exposure times were 28x10 minutes Luminance 12x10 minutes Red 8x10 minutes Green 12x10 minutes Blue Overall I'm pleased with the result as the detail and colour of M78 is there The full size image is at the following link http://m2.i.pbase.com/o9/29/869929/1/158878992.f3h1SVxq.M78LRGB.jpg Best wishes Gordon
  4. When I said the OIII was fairly strong I should have qualified that by saying that it was easily visible in the downloads which I classify as strong compared to some subjects, the OIII was spread over a wide area unlike the SII which was very weak and there was little of it, as with most narrow band subjects both the OIII and SII needed stretching in order for them not to be overwhelmed by the Ha Best wishes Gordon
  5. Actually the OIII in the body is fairly strong although there is none of the contrasty detail that the Ha has, the head is mainly Ha with a bit less OIII, this would probably explain why the OIII in the body is a much richer blue. The SII in comparison is very weak and there isn't a lot of it although with care it does contribute to the overall result. The field of view of the NP127/FLI16803 astrograph is 192x192 arcmin or just over 3x3 degrees, the diagonal fov is 4.5 degrees Best wishes Gordon
  6. Hi I managed to shoot some SII and OIII data last night to finish this off although for part of the evening I was shooting through bonfire smoke and then high mist at the end of the night. Although conditions could have been much better I'm still pleased with the final result. This was taken with the Televue NP127/FLI astrograph on my Paramount ME with exposures times of 24x10 minutes Ha, 22x10 minutes OIII and 30x10 minutes SII. There is plenty of Ha and OIII but the SII is very weak. Hope you like it The full size image can be seen at the following link http://m4.i.pbase.com/o9/29/869929/1/158125374.hYQ7hd5B.Sh2132HSTfinal.jpg Best wishes Gordon
  7. Hi This is my first attempt at doing a mosaic and this has taken a month to shoot all the data because of work and weather. It was taken with the Televue NP127/FLI prototype astrograph which I have been testing (and I am glad to say I am keeping). This is on my Paramount ME and auto guiding was done by a lodestar with dithering. As an experimentation I tried various ways of stitching the two panes together and found that out of Photoshop, Maxim DL and a freeware programme called Microsoft ICE the latter was the easier to use and did the best job. Exposure times are as follows for each of the two panes 20x10 minutes Ha 24x10 minutes OIII 24x10 minutes SII The colour scheme may be a bit different to how others do the HST palette but there is no clear defined rules for the colours so this is my interpretation. A larger version can be seen at the following link http://m7.i.pbase.com/o9/29/869929/1/157353587.PyUO2bU6.heartsoulhst4000.jpg Hope you like it Thanks for looking Best wishes Gordon
  8. Hi I just finished shooting this before our recent spell of clear nights came to an end, it is now raining again. This was taken with the Televue NP127/FLI astrograph that I'm testing on my Paramount ME. Auto guiding was via Starlight Xpress Lodestar and Officine Stellare Falco guide scope using dithering. Exposures are 26x10 minutes Ha, 24x10 minutes OIII and 25x10 minutes SII The full size images can be seen at the following link http://m7.i.pbase.com/o9/29/869929/1/157069827.klJ1Qp3c.TulipHST.jpg Thanks for looking Best wishes Gordon
  9. Hi This is another of the seldomly imaged Sharpless objects, this is in the constellation Vulpecula. It was taken with the Televue NP127/FLI astrograph that I'm testing. Exposures are 19x10 minutes Ha, 20x10 minutes OIII and 12x10 minutes SII. There is very little OIII and SII tends to meld into the Ha the full size version can be seen at the following link http://m6.i.pbase.com/o9/29/869929/1/156982096.s0k8evPA.Sh286HSTfinal.jpg Thanks for looking Best wishes Gordon
  10. Hi This has been my toughest target to date mainly because of the extremely faint OU4 (Giant Squid Nebula) that lies within Sh2-129 (Flying Bat Nebula). They are strange objects in that there is Ha and SII in Sh2-129 but no OIII that I could detect and OU4 only has OIII but no Ha and SII. OU4 was discovered in 2011 by French astroimager Nicolas Outters hence the designation OU4 and it is thought to be a bi-polar planetary nebula. Exposure times are as follows Ha = 28x10 minutes OIII = 45x10 minutes SII = 23x10 minutes As with all my current images this was taken with the Televue NP127/FLI astrograph that I'm testing on my Paramount ME with auto guiding done by a Starlight Xpress Lodestar on an Officine Stellare Falco guide scope using dithering between exposures. The image is still a bit noisy which may be resolved by shooting more data but I'm reasonably happy with the result as my main aim was to get the squid to show. The blue channel (OIII) required more stretching than the Ha and SII hence the bluish background and didn't show any detail at all on the downloads or the stacked master frame, it didn't start to show until after the second iteration of curves before colour combining The full size image can be seen at the following link http://m7.i.pbase.com/o9/29/869929/1/156838737.SkzNJ9VY.Sh2129_OU4HST.jpg Thanks for looking Best wishes Gordon
  11. Hi Due to a recent spell of good weather and being able to image for 5 clear nights in a row (an all time record!) I have been able to finish this image in less than a week, it is of IC1396 in the HST palette. It was taken with the Televue NP127is/FLI imaging system that I'm testing on my Paramount ME with auto guiding done by a Starlight Xpress Lodestar and Officine Stellare Falco guide scope using dithering. Exposures are 21x10 minutes for Ha and 24x10 minutes each for OIII and SII The full size version can be found at the following link which shows the detail much better http://m0.i.pbase.com/o9/29/869929/1/156739950.9N00guZ4.IC1396HST.jpg Thanks for looking Best wishes Gordon
  12. Very nice Fay, it is worth while spending some time on both OIII and SII on this region as the end result will be worth it and create a very colourful panorama Best wishes Gordon
  13. Hi This seldom imaged nebula is fairly close to NGC7000 and isn't often done in narrow band due to the very weak OIII and SII signals. The OIII is so weak that it doesn't show up on the raw frames or the stacked master frame until it is stretched quite considerably. This was taken over 3 nights and comprises of 17x10 minutes Ha and 20x10 minutes each of OIII and SII. As mentioned the OIII in particular needed a lot of pushing in the processing so some of the stars may have a bluish tinge as a result. It was taken with the Televue NP127is/FLI astrograph that I'm testing on my Paramount ME. The OIII and SII data was shot during the recent "Super" full moon. The full size image is at the following link http://m3.i.pbase.com/o9/29/869929/1/156564043.61sPzm9r.Sh2119HSTmax.jpg Thanks for looking Best wishes Gordon
  14. Hi I just finished collecting some more OIII and SII data on this last night, this is 20x10 minutes Ha, 24x10 minutes OIII and 26x10 minutes SII. It was taken with the Televue NP127is/FLI imaging system that I'm testing. (This system is going to be available from September). Auto guiding was by a Starlight Xpress Lodestar and Officine Stellare Falco guide scope on my Paramount ME. Dithering was used during guiding. The Soap Bubble nebula can be seen below and to the right of the Crescent Nebula but only shows up clearly on the full size image which is at the following link http://m7.i.pbase.com/o9/29/869929/1/156396407.9FRKAVRI.NGC6888HSTmax.jpg Thanks for looking Best wishes Gordon
  15. Hi Olly Thanks for the comments, regarding the exposure times I was using 30 minute subframes with this camera on my FSQ106ED and the reason I changed to 10 minute sub frames since putting it on the prototype NP127is/FLI imaging system was more to do with getting as much in the way of results in a quicker time frame. By doing this I have been able to compare the difference between doing 10 and 30 minute sub frames and to be honest I find that the 10 minute subframes yield better results overall. Admittedly you need more sub frames per filter but then you are less likely to be affected by a wandering cloud, also the stars don't tend to saturate as much. I find that the level of detail is just as good. With the 9 micron pixel size and QE of the PL16803 combine with the f5.2 of the NP127is 10 minutes is plenty even for narrow band. I went to NEAIC in April and there was an interesting talk by Jim Moronski from FLI about some of the myths of astroimaging and the length of exposure times came up, in that a lot of people go for longer exposures without looking into the characteristics of their camera properly. Interestingly the optimum exposure time for the PL16803 is 10-15 minutes. Best wishes Gordon
  16. Hi I started this in April shortly after I got back from my trip to NEAIC/NEAF and have finally finished it last night. This is a total of 24x10 minutes Ha, 21x10 minutes OIII and 23x10 minutes SII taken with the Televue NP127is/FLI imaging system that I am testing on my Paramount ME which has just had a new power supply as the cables were a bit frayed after 7 years. Hope you like it. The full size image can be seen at the following link http://m9.i.pbase.com/o9/29/869929/1/156149119.3TPksoN6.NAPelicanHST.jpg Best wishes Gordon
  17. Hi Thanks for the comments, the system is working fantastically, I was over at NEAIC doing a talk in April and for NEAF after and spent some enjoyable time both socially and helping out with the Naglers and Televue. I'm hoping that the beta testing period is going to last a lot longer yet Best wishes Gordon
  18. Hi I don't normally do galaxies especially the smaller ones as I use a short focal length and large chip sensor and because of light pollution but occasionally when the conditions are right and there are no narrow band targets I will have a go at some LRGB. I've always wanted to have a go at this subject and with the system that I am currently using having the optimum field I thought I'd give it a go. This was taken with the Televue NP127is/FLI system that I've been testing on my Paramount ME auto guided by an Officine Stellare and Lodestar and it consists of 30x10 minutes luminance and 12x10 minutes each of RGB, it was taken over a period of several weeks due to weather, moon and work but I think the end result was worth it. I haven't inserted an image as I don't feel the small size portrays the field properly so I have inserted a link to the full size image below. My only regret is that I could have framed it a bit better to include the two nice galaxies in the top left of the image instead of cutting them in half, oh well, next time round maybe. http://m7.i.pbase.com/o9/29/869929/1/154959967.TprElJSJ.MarkarianchainLRGB.jpg Thanks for looking Best wishes Gordon
  19. Hi It is the second time I was at NEAF, last time was 2010, I was invited to do a talk at NEAIC this year which was a great experience. I spent most of the time at NEAF helping my friends out on the Tele Vue stand, I've been testing a joint collaboration system for them and FLI for the last 10 months. It was a great show both NEAIC and NEAF and the food, drink and company was great Best wishes Gordon
  20. Hi I was there for NEAIC and NEAF, I did a talk on the Friday morning at NEAIC. I had a great 5 days and the weather was good Best wishes Gordon
  21. Hi I just finished this a few nights ago, this has taken several nights to do due to weather and false starts, it is 24x10 minutes Ha, 26x10 minutes OIII and 22x10 minutes SII. The seeing conditions were very poor for the SII data with some very thin misty cloud throughout the evening. This was taken with the Televue NP127is/FLI imaging system that I'm testing, this is set up on my Paramount ME with auto guiding taken care of by an Officine Stellare Falco guidescope and Starlight Xpress Lodestar camera. Image acquisition, guiding and stacking was done in Maxim DL5, the images were registered with Registar and processing was done with Photoshop CC. The full size image can be seen at the following link http://i.pbase.com/o9/29/869929/1/154765888.euHYVpzp.JellyfishHSTfinal.jpg Thanks for looking Best wishes Gordon
  22. Hi This is a bit of a short overall exposure time of just over 3 hours total (normally I do more than that for each filter!). I have a very small window in which to get any imaging time on this subject due to my house blocking the east sky and then the roof of my shed almost blocking the guiding scope and then finally my neighbours tree puts an end to any more imaging for M42. I am able to get 1 to 2 hours on this in an evening depending on the time of year. I managed to get just over 3 hours total in three nights and despite the overall short integration time I'm quite happy with the results. I will have another go later in the year when it comes round again but this will have to do for now. It is 12x5 minutes Ha, 14x5 minutes OIII and 12x5 minutes SII mapped to the HST palette. It was taken with the Televue NP127is/FLI imaging system that I'm currently testing. Guiding was taken care of by an Offcine Stellare Falco guide scope and Starlight Xpress Lodestar. Interestingly, my guide star went oblong in shape part way through the session as it was skimming the roof of my shed but this didn't seem to affect the guiding. This is the first time I have attempted this subject in full colour. A full size image can be found at the following link http://m9.i.pbase.com/o9/29/869929/1/154652989.YZdzfSiE.M42HSTmax.jpg Thanks for looking Best wishes Gordon
  23. Hi I have been busy on this for a few weeks trying to finish it between the rain and cloud. This is a difficult subject in OIII as I couldn't detect any at all on the downloaded subframes. Anyway, after a fair bit of stretching I've got an end result that I'm happy with. I've just got a new computer and the screen is quite bright and contrasty compared with the old one so I've had to desaturate the colours a bit. This was taken with the Televue/FLI system that I'm testing. Exposures are 20x10 minutes Ha, 24x10 minutes OIII and 18x10 minutes SII and then assigned to the HST palette. The full size image can be found at the following link http://m6.i.pbase.com/o9/29/869929/1/154217776.I2Yc0odM.NGC1499HSTmax.jpg Thanks for looking Best wishes Gordon
  24. The focal length of the NP127is is 660mm
  25. Hi Paul The Atlas with the 16803 is superb, can't fault them. I haven't seen Richards version yet, I will have to go and check, I know he was doing this same subject Best wishes Gordon
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