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  1. Past hour
  2. Hello, I have an older Skywatcher Dobson. Can you please tell me what screws I need to turn to Collimate the mirrors for the primary and secondary mirrors. Pictures attached. Thanks.
  3. Today
  4. Your experience isn't something I'd consider inconsistent with mine, Louise. 3D printers are not really a "consumer" item yet, and as such they need a bit of effort putting in before they will work reliably. Once you've done a few prints and got the hang of how they behave it all becomes much easier. At first that can mean a bit of head-scratching to work out why things work sometimes and not others, but slowly it all starts to fall into place. James
  5. Folks have asked about these two sensors and I thought as long as I have the same target taken with the same scope 9TOA 30) with the same amount of total expoure time (about 6 hours) I would post them. A bit of irony is I used a reducer for the STT-8300 (KAF 8300) image, and I binned the ASI 1600 image 2x2 in software. For this reason the images are the same resolution (1.59 arcsec/pix) but the FOVs are different. I think the brightness difference between the images is do to me stretching the STT-8300 more aggressively--which resulted in a very inferior background and struggling stars. I also oversharpened the KAF data, and pretty much over processedthe image as a whole. I like all but one star better in teh ASI 1600 image--the only one tht really counts! Its interesting to note that the FWHM for the STT-8300 image is around 5"/pix and for the ASI 1600 its about 3.5"/pix (not to bad for a resolution of 1.59, at least not for me--processing usually increases my FWHM) ASI 1600 KAF-8300
  6. Can you believe it - after ordering the Creality PLA I decided to have another go with the PLA+ - you guessed it, it was fine this time!! Not only that, I used the same temperature settings as for the PLA. Now I'm going to have an extra kg of filament... I suppose it keeps a long time unopened? The SUNLU was vacuum packed. White Creality PLA left, Black SUNLU PLA+ right: I've stayed up much too late - going to bed now. Louise
  7. Very dramatic. I was going to comment of putting stars back i PI--but Richard said it better than I ever could Rodd
  8. I've got to be honest. It may actually be fairies who do the network bit. I've never been entirely sure. James
  9. What Edwin Hubble would have given for a modern astro camera - even an amateur one! Louise
  10. I think it is darned good. I would bring the brightness of the ring way down. Bightness steals dynamic range and color. I bet if you bring the brightness down you will start to see more details and structure. Rodd
  11. Obviously profoundly good. But I bet you can get even further into the core. Brightness kills dynamic range. With your dedication, taking a few shorter subs per channel should be right up your alley. Take a look at this meager green stack. Structures actually go right to the core (almost) There is only a few hours of data here--unlike yours, but the structures are clear. I am sure you can find more detail in your core. Well done on the aquisition and processing. Rodd
  12. The periodic error quoted is much smaller and hence the tracking is far more accurate once aligned. I take care to get the best PA I can and then I follow it with a two star alignment (one of which is currently M31 - very easy to identify!). After that I find the GOTO is very accurate and the tracking excellent. Most of my imaging is with 120s or 180s exposures 135mm focal length and there is no sign of trailing. I love the fact I don't have to use a guidescope or PHD. That is not to say that my days of guiding are over - when I get the ZS71 on the mount (~320mm) or maybe the ED80 (~520mm) the increased focal length may well require me to guide. Time will tell! Adrian P.S. Have you ordered it yet?
  13. I have the s version 102 TSA and just bought a moonlight focuser for cost $713 I decided to keep it. Views out of it r crazy. But I would sell my 120 TSA but of course I'm sure u would want one closer to u and not as far away as I'm at in cdn Joejaguar
  14. Yesterday
  15. This is my first attempt at a colour mosaic. Despite the join being obvious, I am still very pleased with it. I've done several mono mosaics over the past 18 months and been surprised at how difficult it is to match up both contrast and brightness along the edges of adjacent frames. I thought that going to colour would make the problem much worse. It has made it a bit more difficult, but it isn't as awful as I expected. Processing and combining was done in the Gimp. Each panel is Ha, O, O for RGB. The OIII data for the Soul is binned 2x2. Any advice on doing these using Photoshop or Gimp would be much appreciated. All sorts of other comments would be welcome too - especially about how it looks on peoples screens. I have a strong suspicion that my screen is too bright, so I might be posting very dark images!!!
  16. I insure myself against car theft by driving the scabbiest car in the area. My wife had to drive it for a few days recently when hers was at the garage. She insisted on washing it. I can't find it in the car park any more. James
  17. I have had trackers fitted on most cars over the past 15/20 years. Even my caravan had a Cobra tracker fitted. That is until recently, I was always quoted a slightly cheaper overall cost. But lately I began wondering if it was necessary with the better so called security systems on cars. Bit of a laugh really considering we are now informed, well over the last few years, that the criminals use electronic cloning devices to pinch the vehicles. If you use a tracker with gps it is negated very easilly by sticking the vehicle in a container or garage until the tracker is disconnected. The phone and sim types are not much better. Carry a Faraday case for your keys and maybe your vehicle will be safe-ish. But I have not heard of this insurance clause up until now! To cap it all both my wife and I use the same insurer. Slight discount. But whilst my insurance went up by about £10 2.5%, this year hers has just been quoted at an extra £56 approximately about 20% increase. Does not make any sense to me at all. Hey-Ho off to look around once more!
  18. Try having a look at GIMP for editing too. it’s free and there are tutorials on YouTube for AP image editing. it’s not the best but certainly better than a kick in the teeth, failing that as spillage says StarTools does a free version just have a research for best DSS settings to use for best results. Nice solar/lunar images btw
  19. Does anybody here know how to use IronPython scripting that is used in SharpCap Pro? I'm looking for help writing a very simple script....at least I think it should be. But I'm completely dumb when it comes to this language and am having no luck on my own. Here's what I wish to do for the upcoming Mercury Solar Transit with my Lunt 80mm Ha scope. I want to make a timelapse video from a series of stacked .ser files. I want to shoot 1000 frames once every 30 seconds that is exposed for the surface. exposure time TBD. Then, I want to shoot another 1000 frames exposed for the edge prominence details. I would like to place these two files in two different directories on separate harddrives. And of course have this script repeat itself for the entire duration of the transit. Renaming and/or numbering the files would be a bonus. I've posted the same request on the SharpCap forum and received limited help from the admin because I think he assumes I understand the scripting language which I do not. I understand it enough to edit exposure times and directory locations but the whole language is just very confusing to me. Any help would be greatly appreciated.
  20. James, I've heard various analogies to describe something, but your little pixies had me in stitches If only Kstars supported those ASCOM pixies things would be a lot simpler, but would mean the INDI and Network pixies would be out of work and claiming JSA
  21. Try stacking the images you have in deep sky stacker and then stretching the image. You can use startools for free to help you process the image. You just cannot save the image unless you purchase it.
  22. Beautiful Images Dave! Congrats and thanks for sharing.
  23. Mine doesn't take anything like that long. Prints usually come off when the bed temperature comes down to about 40-50°C.
  24. If you want some screen I probably still have some you could have.... How big a funnel are you going to use? Or I think I remember a suggestion of using doubled up shower curtain Helen
  25. Patience and differential expansion rates seem to be your friend in this instance, though I've never used a mat such as yours. I usually allow the bed to cool to roughly ambient temperature before disconnecting the control software and give it ten minutes or so, by which time the parts usually loosen themselves from the bed. James
  26. Quite right! But then, you don't have to. I gather that removing the mat and bending it is the normal method.
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