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Carl M

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About Carl M

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    Star Forming
  • Birthday 12/04/94

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    Ramsey, Cambridge, England
  1. You have some nice detail coming through there despite conditions. Only criticism I can give is that it looks a little green, give it a run through Photoshop with Hasta La Vista Green plugin and it should sort it.
  2. Yes I agree it doesn't look like star trails. Looks like coma that is being exacerbated by a spacing issue. I'm sure I've seen something like this before when people are imaging through an eyepiece projection method.
  3. Don't give up hope on it just yet, when I modded my 1000D as part of my dissertation myself and my co-workers had to take it apart and put it back together probably close to 10 times...and that was with 3 different people. Initially there was no response at all when turning the camera on after modifying we called it a day and thought it was probably dead. Next morning we took it apart again and reseated all the ribbon cables again, and like magic, it just happened to work fine again. I'm still using it to this day and have had no technical problems with it at all. Did you mark the ribbon cables with a sharpie or anything of the like? That's one of the things we forgot to do, it seems the ribbon cables are a bit picky on how they want to be seated. Perhaps go back to it another day and do the complete teardown again and try reseating all the cables again? This was what I was recommended to do, and although that was what we had been doing all along we still tried it again the next day and managed to get it working. At least yours was showing some kind of life after modifying, ours was just dead; no error, lcd didn't come on, no led on..not great motivation to keep trying
  4. Neq6 will be fine, my C9.25 is piggybacked with an ST80 on an older style EQ6 and still rock steady. You then have the option to use guidescope or OAG if you choose to autoguide. Most people would swear by an OAG when guiding an SCT, but can initially be a bit fiddly with spacing and getting focus with both cameras. I'd also recommend using the 12dstring FOV calculator or similar if you haven't already, you may find that some DSO's you want to image in the future won't fit fully in the frame (M42, M33, Andromeda etc..), even with the reducer. Other than that SCT's are great for the smaller objects.
  5. Yes you can use a C8 for small planetary nebulas and smaller galaxies, but it also depends on how well you are mounted and how accurate your autoguiding (or lack of) is because of the longer focal length. How are you planning on mounting it?
  6. m78

    Not sure whether you have it activated in PHD2 but it should save and deposit a guide log .txt file somewhere on your computer. If you have the log you can open it with a log viewer and show the graph from there as well as RMS values I believe.
  7. Thanks Martin, I agree the original is a bit too red - can see it especially in the stars. I added a star mask and de-saturated it a little to turn down the redness of the stars while boosting the blue and reducing the red a bit for the rest of the image. Hopefully this is a slight improvement.
  8. Thanks for that, if it were to be collimation would rotating the camera around the focuser change the direction of the worse corner in the image? I imaged M42 on the same night and looking at the images from that it shows that the top left is still the worse corner? Got me thinking perhaps it's something to do with the t-ring/coma corrector not sitting square - maybe even the sensor itself since it was self modified.
  9. m78

    PA first and then do the goto alignment. How do you mean rough PA using guidescope? You should only be using the polarscope of your mount to do your polar alignment, ignore whether you can or can't see polaris in any of your telescopes. You are attaching the polemaster to your mount to do your PA and not your guidescope? I'm no expert when it comes to guiding, but I've read that tolerable RMS is dependant on the equipment you are using. In either case I would assume that the lower the RMS better. Here was what my graph looked like on a good night, it's not always as flat but RMS was low and the pictures I was getting from camera were not trailing. Perhaps someone with better guidng knowledge can chime in if I'm wrong Hope this helps.
  10. It's a lot easier to fit in the frame, I had no end of trouble trying to get the whole of M31 and it's companion in the entire FOV a while ago. Felt like I'd tried every degree of rotation around the focuser with the camera!
  11. m78

    By pointing accuracy do you mean for the goto alignment? You can use your camera if you can get the star in the middle of your LCD. I find it's much easier to use a high power eyepiece to center the star then add the camera later. On the final star of the alignment attach the camera and use the star also for focus. Then you've finished the alignment as well as sorting focus for your camera ready for when you want to slew to your target. Your stars still do seem to be eggy, how is your guiding graph looking and RMS values? Since SCT has pretty long focal length any guiding or polar alignment glitches will really show up. Try and spend a night trying to get your guiding and polar alignment down to a T, it will really help a lot on future outings.
  12. Well it's fair to say I've spent way too much time trying to process this...which is probably a sign it needs more data as well as calibration frames - no flats/darks/bias. Still seem to be getting stars elongated at edges of images (worse in top left), which I cannot work out to be either coma or collimation, perhaps my Baader MPCC needs to be updated to a newer version (assuming it is coma)? Anyhow.. finally managed to get some data I was happy with and where the guiding was content. 21 x 300s at ISO800 Full spectrum 1000D with Astronomik CLS-CCD clip filter Quattro 8s on EQ6 guided with ST80 and QHY5II Processed in Photoshop and Pixinsight for DBE For just under 2 hours of data I'm quite happy with it! Thanks for looking, Carl
  13. m78

    I'm not too sure on that one, with a little bit of research I found this guide which supposedly gives a similar result to HVLG but using GIMP's implemented features. Here is the link. It's an automatic translation from French but seems understandable and gives a few different ways of trying it. Might be worth giving it a go, good luck!
  14. m78

    You've got rid of the hot pixel trails which is a good, your image has a green cast to it which can be removed with HLVG filter in photoshop. In fairness, I think you picked a pretty difficult object to image with the SCT. Crab nebula should be a much better target, how were the subs from that, stiill eggy stars?
  15. m78

    Blimey, a lot more long winded process than mine! As I say, not too familiar with polemaster, surely once you've polar aligned with that you should be done? In step 6 you say you are adjusting the bolts again, are these the latitude/azimuth bolts you used to polar align with polemaster? I would swap step 5 and 4 around. Polar align first using polemaster and then do your goto star alignment. Once you've aligned with polemaster you shouldn't need to touch polar alignment or the latitude/azimuth bolts again.