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About Ouroboros

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    Brown Dwarf

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  • Location
    South Oxfordshire & North Cornwall Coast
  1. I am looking for a general photo editing application for my MacBook. It is not specifically for processing Astro images. I use Pixinsight for that. I don’t mind paying for an application, within reason, but I definitely do not want to pay a subscription to Adobe for Photoshop. The sort of editing I want to do include: histograms, levels, colour balance, crop, re-sample, rescale, resize, add text and print. Any suggestions/recommendations? Some background: I have used my own copy of Photoshop CS5 running in Windows for many years. But now Windows 7 is no longer being supported I have decided to junk Windows completely and move across to only using Mac compatible software. It will also clear some space on my Mac because I have been running Windows 7 as a virtual machine.
  2. Yes. In my case I use a small guide camera on a finder scope. The camera is connected to my MacBook. The mount is set to the home position with the guide camera looking at the pole. The software (KStars/EKOS) takes an image of the sky around the pole. It rotates the mount by a few degrees a couple of times and takes pictures. The software plate solves the three images and works out where the mount is pointing. Using a live image I adjust the mount to point at the celestial pole. Several similar systems are available on Windows and Mac that work in much the same. Sounds easy, but there’s a learning curve to climb. Depends what you want to do. Long duration exposures require good polar alignment. Frankly if you just want to do some visible then learning to polar align with the mount is the easier climb I’d say.
  3. Good advice so far. I’d only add a couple or three points. If you only want to do visual or short-ish duration photo-exposures then polar alignment with a polar scope is adequate. Somewhere in the manual it describess how to check and polar align using the handset during the star alignment stage. I’ve never done that but it might be worth checking out. When I first bought my mount my polar scope reticule was quite badly misaligned w.r.t the RA axis of the mount. I had to centre align the polar scope reticule. Here’s a nice video showing how to do that. It’s for an Orion mount, but it’s exactly the same principle on an AZ-EQ6. I now nearly always polar align using plate solving with my computer controlling the mount. But sometimes I just want to set up without the computer to do some visible observing. So being able to quickly polar alighn is a useful skill IMO. Good luck.
  4. I am reluctant to condemn or ridicule people who believe wacky things. First off I think it's their right to believe whatever they want, and to express those beliefs. Secondly I think eccentricity is something we should accept and even celebrate. There's too much condemnation of people who think differently or who are different - as the Internet reminds us only too well. Thirdly it's good to be sceptical. It is through sceptics and those who question that we make progress. Now I'm not suggesting that flat earthers are misunderstood geniuses. They're not. But maybe in order to have a few Einstiens and Leonardos we have to put up with a few outliers on the normal distribution curve of wackiness.
  5. There's no arguing with people like that. Whatever evidence is put to them they will always find some excuse or counter with some conspiracy argument or other. Perhaps the most interesting aspect is why do they do it? What motivates them? Are they attention seekers? Are they simply contrarian by nature? Are some quite cynically making money out of promoting wacky ideas that they don't even believe to be true?
  6. Working linky ..... :-) Giant bubbles spotted rushing out from Milky Way.
  7. Yes. I have owned two equatorials (SW EQ5 & AZ-EQ6) and both have been sufficiently stiff with the clutches off that they can be considerably out of balance before they start to rotate. I use a sort of dynamic balancing method. I see which direction the mount is easier to push and how far it moves before stopping. I shift the weight until that feels the same in both directions.
  8. @Longinthetooth excellent! Well done. I bet you're relieved. About the USB.... Does that mean they supply a new faceplate with the upgrade? There's nowhere for a USB socket otherwise. Or have I grasped the stick at the wrong end?
  9. Yep. Blow that trumpet. I know I would. Great image!
  10. @CKemu OK. THanks for that description. So it's not a completely automatic process, which I imagined it might be. It sounds like a degree of judgement and tweaking is required.
  11. Yes. Very nice indeed. And as others have said, very natural colours. I've never done a panel. How do you make sure you can't see the join?
  12. An incredulity argument is one which says something is most likely so because it is impossible or difficult to imagine the opposite might be true. An example is the argument that goes something like: alien life must surely exist out there somewhere because the universe is so big and there are so many planets blar blar blar ..... It's a fallacious argument of course.
  13. Yep. Fair points. Although one might argue that in the example you cite Galileo was as much using the 'incredulity argument'.
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