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The Admiral

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  1. I too was saddened to get the news. A very difficult subject to get over to the uninitiated, and I applaud his courage in setting up this successful course, which I enjoyed very much. R.I.P Ian
  2. You've done well with that DorsetBlue, but as is so often the case more can be found in images by being more assertive in the processing . It does no harm to push things hard just to see what is there, and with StarTools I find that the initial images often don't look so good but are reined back as processing proceeds (some may argue they don't look so good when I've finished, either ). Probably above 65° going by Stellarium, but not only that, field rotation demands a much shorter exposure the higher the altitude and the closer to North/South. Ian
  3. OK, but I guess it must depend on the 'home' position, though I'm not really sure where that is with my Nexstar. But if my 'scope is pointing due East after aligning, that is, Az=90°, and the target is at Az=76°, when I request the target the 'scope will start twirling with increasing Az, presumably going almost full circle, if I was to let it. Are you saying it would get to, say, Az=0° (assuming that is the home position) and then reverse back to Az=76°? All very odd. I'm sure it didn't behave like that prior to installation of the Starsense. Ian
  4. How strange. I woukd have assumed that the cordwrap function would have stopped it twirling the long way around! Ian
  5. I've a newly acquired Starsense which I used for the first time a few weeks ago with my Nexstar SE mount, and I found as you did that having done the align that if my 'resting' position was 'more clockwise' than the target I was seeking, the mount started to go clockwise all the way around. It didn't seem to figure that to it would be much easier to go anti-clockwise to get to the target. So I always ensured that my starting position was more 'anti-clockwise' than the target. I've not had had an opportunity to investigate the cord-wrap function, but I did discover that it isn't just a question of switching it on, which I tried, but I think the limits need to be set up. Is that your understanding Ken? Good luck. Ian
  6. I think it also needs to be remembered that some applications are colour managed, and others not. And that includes browsers. So if you produce an image in, say, the sRGB or the Adobe, colour space and the application isn't colour managed (i.e. takes account of the colour profile), then the appearance will not be predictable. Similarly, if your monitor is colour calibrated, I'm not sure whether all applications will use the monitor profile for display. I don't think that will account for all the differences though Neil, but it's certainly a big issue for reproduction work. Quite a minefield! Ian Edit. Ah, I see you're on to that one!
  7. Did you say "dusty substances"? Takes me back to an old Peter Cook and Dudley Moore sketch . I'll get my coat! Nice image by the way. Ian
  8. Welcome! You've made a great start there Andy; I hope that you found Ashley's book of interest as it has some good advice for us non-EQ imagers. It can get you hooked . It's also a way of honing your skills before committing much larger resources, and indeed, deciding if you do want to commit. It's difficult to advise without more information about your set up - what gear are you using, how many exposures of lights, darks, flats and bias, exposure length and ISO? Ian
  9. Strange isn't it? As you know I've moved from DSS to AstroArt in order to stack my Fuji RAFs directly without having to convert to DNG, so I haven't tried any of this bias for darks malarkey in DSS, but it does seem to work fine in AA, and saves me a lot of time. I can't see any difference between your three outputs, what do you think? Aah, I see you've taken the plunge with PI! Now you really have moved over to the very, very dark side . Then again, if you're using PI, why are you stacking in DSS? Ian
  10. What was the outcome Nige? Ian
  11. Nige, look at the Alternate Calibration Process II. Unfortunately, it is a bit convoluted to find. Use the link, go to 'Users Manual', go to 'lights, flats, to make them', then click on the first 'here' link. Sensible approach, do it the simple way first . Interesting to hear what you get. Ian
  12. Now I'm confused. You shouldn't need the bias as well, surely? I think I would have just used the separately stacked bias instead of the flats dark, and a copy, re-named, as the dark. In AstroArt, I only have catrgories for flat dark and dark, both of which I replace by the master bias. Ian Edit. Can you mix raws and tif files in DSS? Try using DSS to stack the bias frames (raws?) and save as a fits. Dunno, might help!
  13. Failed indeed! What file did you put where? Bias frames taken at same ISO? Was it totally blank? Ian
  14. Good point, and if you go for a spotting scope check that they can accept standard eyepices. My Opticron has a proprietary fitting, and doesn't. Ian
  15. That's my understanding Nige, but if you use DSS I think you might have to re-name one of the bias files 'cos it doesn't like duplicate files. I guess whether it's a dark flat, or just the bias, doesn't really matter. You might find something in this recent thread: Ian