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The-MathMog

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Everything posted by The-MathMog

  1. Sure is. It is easy to forget how high of a latitude Denmark actually is, compared to how the weather is. We basically had no snow this winter. That is because, looking at big weather-systems, we are basically sheltered by Norways mountains. The same latitude in the Americas, would be well into Canada.
  2. Yeah, definitely think I will. Almost certain that it was a case of being locked in place with big temperature-shifts for a while. And it is working fine and dandy again. Might do that. I do have the telescope and mount permanently set-up though, to minimize any changes in image-rotation, balance etc, and setup-time. Right now I can just bring the tripod out, then the mount with the telescope attached, bring cables in, and I'm pretty much rolling Indeed, having to send it off for repair or the like, was the last thing that I wanted to do, with 4 nights of clear night still to
  3. I own the ES HR Coma Corrector, and it works great for my camera/telescope setup, when the sensor to objective distance is correct. I've read in the manual that the distance isn't AS crucial with DSLR's (for some reason unbeknownst to me), but if you are still struggling with coma, then the recommended distance is 55mm from sensor to objective. And great images for such short exposures, but with a beast of a scope like that, no wonder..
  4. I got it loose! Thanks for the help! I used some duct-tape on the coma corrector, and then made an improvised double-sided tape for grip. Then as suggested I gave it some good taps with the end of a plastic multitool, and it came loose in no time. Thanks a lot you all!
  5. I own this one, and have spaced it from "A", and that works fine
  6. First time in a years time it has happened to me, and could only really find one other thread about it, so not sure. It has been working amazingly until now. I'll try that, but as mentioned, at times when applying enough force, the whole Clicklock will just turn around the coma corrector, showing that it isn't holding it THAT tight. And I can't really get a grip on the two parts of the clicklock that needs to rotate from one another either. Just cleaning it if it works, will be worth the hazzle ^^ I'll give that a go, cheers.
  7. Darn, I sure hope it doesn't come to having to have them repair it... F the clicklock, the ES Coma Corrector is the heart and soul.. I might try those suggestions of yours. Not sure exactly what nylon strap oil filter wrench exactly translates to in danish, but I'll have a look. Only issue is too, as said, the coma corrector is very slippery, and there isn't really a part of it, that is easy to get a good grip on.. And even if I hold it, the whole clicklock just seems to turn around it, as if its grip is not THAT tight. I'll try to see if I can release it after this session, as it will
  8. So, I wanted to change the distance from my camera sensor to my coma corrector, but before removing the assembly from the telescope, I was unable to release the lock on the Baader 2" Clicklock... When trying to turn it, it just screws off of the telescope (as that is how it is mounted). I can remove the other parts, and easily take the whole train off the telescope, but the click-lock is stuck to my coma corrector, and I can't for the love of me get it to release... If I use enough force, the Clicklock just slowly slides around the coma corrector, and it is slippery as hell, so I can't get a
  9. I had something similar to this recently, and found out that it was an asteroid that slowly moved through the picture through the night. So when LRGB was taken it was in a slightly different spot. I don't have enough knowledge to say that this is certainly the case, but a possibility.
  10. That is one stunning image right there! Great job!
  11. As mentioned, a bit green/yellowish to my eyes too. I don't really see much of the uneven background though. But great data! And I couldn't help myself, having a twiddle with it in photoshop. This is how I personally would color-balance it Using the color balance tool, until the background is nice and black, giving my eyes "rest" and then looking at it again. A curve, boosting the blue areas of the galaxy, and then a slight saturation boost + some local sharpening on the dusty parts.
  12. You'd need to redo the flats yes. Anytime you change your setup/remove camera/remove filter, you need to take flats again, as they only work when you keep the imaging train the same as the lights. Darks you don't need to take again. Not sure with dark-flats as I've never used those. Flats should be taken after each session, as dust can have changed positions. Darks you can reuse, if the settings are the exact same, hence why some people make "dark-libaries", where they have a collection of dark frames with different exposure/temperature/gain values.
  13. That image doesn't seem all too bad. If you had a lot of those, stacked properly, I'd think that would yield good results. Have you tried stacking with DSS? And cheers - all trials and errors the last few years
  14. I I'd say, just continue using the Bahtinov mask. If of good quality, it can produce near perfect focus. There is even tools (sharpcap has it), that analyses the Bahtinov spikes, and help you focus. When working with FWHM (full width half maximum), just get the number as low as you can, that is the best focus. Alright. The 0.85 SW reducer, will definitely help your image, in the edges. I'd personally go for it, as assembling and disassembling an imagetrain can be training in itself. I read about someone, who when processing an image, would get to a point where he was happy wit
  15. Nice image btw Depending on the camera, as I am not familiar with it, it could definitely be a possibility that, that is too long an exposure / gain. As long as you are capturing files in a raw format, with the highest bit possible, you almost always pull out a lot more data, than is evident at the beginning. If you've overexposed, you can't really recover those areas. Here is an example of what an image looks like for me, straight out of DeepSkyStacker - and then what a quick stretch in photoshop reveals
  16. Hey there. I am curious, as to what media or software you guys are using, in terms of knowing when certain alignments, conjunctions or events happen? I actually had a clear sky, a couple of days ago, when the conjunction of Venus and the Pleiades happened, but I didn't know until the day after. I even thought: "what a nice clear sky, but naaah, the moon is way too bright tonight" (I mostly shoot galaxies these days). So I am actually a bit bummed at missing that. So, what good sources are you guys using? I am mostly using stellarium, reading a bit on the forum here, and looking into
  17. From the dates you just stated, yesterday and the 25th of march, I would say that the moon is definitely the dominant factor here, and that you can't use the comparison there. The moon as it is, is nearly full and will significantly brighten the sky, hiding a lot of details of faint galaxies. Back at the 25th, the moon was under the horizon basically the whole night. So I would say, wait until the moon is crescent and/or below the horizon, and then try again I've heard a lot of good things about this filter too, so give it another go
  18. I would try that yes, as you can definitely end up overexposing some targets. Especially bright ones like the Orion Nebula. What camera did you use, how long was the exposures, how high gain etc? Even though M42 is quite bright, it is actually a hard target to expose right, without blending several exposure ranges, as it has a veeery bright cores, but faint flimsy parts. The best results I've gotten, has been combining short exposures of 10-30 seconds with long 2-4 minute ones, or even adding even longer HA ones. If you got a picture you could share, that would help too. But exper
  19. The focus seems alright. In the middle. But at the edges, the stars definitely start to suffer from an uneven flat field. What is your gear, and are you using a field flattener? The star shapes can definitely be affected by the 90 second exposure. It doesn't even have to be a steady drift, but small errors in the gear of your mount even. So best is to judge from shorter exposures with high gain/iso to see if focus is good.
  20. Keep it going, and as others have said, keep experimenting and be patient. It will bear fruit! One tip in terms of the focus you can try, to get it more consistent. Try using the camera in daytime, and focus on something in the wast distance/horizon. Then mark where that point actually is. That'll give you a baseline of where "infinity" is on the camera. That, or you can try making your own Bahtinov mask. If you don't already know, it is a mask that you put in front of the camera/telescope, that will help you focus. There is plenty of templates online that you can print, and cut out your
  21. A "quick" comment, as I don't know too much about it.. But the pro for off axis guiding, as far as I understand, is that since you are guiding from the same light-source (the main mirrors or lense in the telescope), you can get more accurate guiding, as there will be less errors introduced by slack and loose connections. If the connection between the focuser and the telescope slacks a bit, it will move both the camera and the off-axis-guider, basically cancelling that out. Where as if you have a separate guide-scope + camera mounted on the telescope, any slack,"bending" or tugging due to ca
  22. Indeed, that is how I take them, so I don't have to wait till dawn!
  23. Knocked, wind, periodic error (quite harsh one), balance issues and backlash? The cables could be a cause too. Best to attach them as much as you can to the telescope, with them still being able to move as the telescope slews/tracks. When I got my Celestron AVX mount, I often saw star trails, more often with longer exposures, logically, but not always. And I found out that it was because of periodic errors in the wormgear. The AVX has Periodic Error Correction learning, and after I did that, and applied it, I went from having to scrap every 2-3 frames, to being able to do 4-5 minute expos
  24. Because of the current situation, I have, as many of you guys probably have too, spend a lot more time under the stars when possible. It has literally been over a year since last I was out doing some astrophotography because of work. So here is my second take after the long break, NGC 3344 (The Sliced Onion Galaxy). Initially I thought it would be a lot fainter than it was, so it was basically a shot in the dark, of just trying to get back at doing this. But the final image actually showed a lot more detail than I would've hoped for! Spring lent a lot of clear night, but t
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