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About cuivenion

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    Sub Dwarf

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  1. HEQ5 very large RA drift

    Hi, I'm getting very large drift in RA with my HEQ5. I think it might be responsible for my bad guiding (double stars in some cases). It seems to happen when the scope is pointed west of the meridian it behaves a lot better pointing east: I disabled the guiding output to try and provide an example. A star will move visably from my crosshairs over the course of a minute or so and PHD2 has to make constant large RA corrections. Do I have a mechanical problem that can be fixed? Is this fairly normal and will pec training help? I have the mount balanced as well as I can with a slight east heavy and camera end imbalance. There doesn't seem to be a lot of backlash. Goto's are good until I cross the meridian which I assume is down to cone error. Any help much appreciated.
  2. DSO Imaging With 150PL - M81

    Great image. What do you use to guide?
  3. M45 - Glowing Gems

    Here's my take on your data using Pixinsight. That was a severe gradient, almost like a full moon: I couldn't really pull out more nebulosity than you have. Process was: Crop-DBE-multiscale linear transform-autohistogram-histogram transformation-curves transformation-unsharp mask-colour saturation. Lots of people round here with more experience than me so I'm sure some of them could have a look. Was fun playing with your data, I tried the same target but the stars were terrible (guiding problems).
  4. M45 - Glowing Gems

    Hi, nice image. I think you may have clipped the black point during processing so you're missing some nebulosity that would otherwise be in the image. It can be difficult dealing with a severe gradient though.
  5. ZWO ASI224 First Light EAA

    Hi, Thanks. The weather is probably similar, I imagine that your skies are a bit darker though!
  6. ZWO ASI224 First Light EAA

    Hi, went out on Tuesday night for my first EAA session in a while. All the image were taken with a Skywatcher 130PDS on a HEQ5 using my brand new ZWO ASI224. Very impressed with this little cam! All images were taken with Sharpcap Live Stacking. Unfortunately the saved files were fainter than the actual viewed image in Sharpcap so I had to use levels in gimp to bring the saved brightness up to the as viewed levels. That was the only post process though. First up, The Horsehead Nebula in Orion 16x30s at gain 305: The Northern Trifid (NGC1579) in Perseus, 27x30s at gain 305: The Fly Nebula (NGC1931) in Auriga, 15x30s, gain 305: The Crystal Ball Nebula (NGC1514) in Taurus. 24x30s, gain 305: The Crab Nebula (M1) in Taurus. I went for a brew and left this running. 64x30s gain 305: The Intergalactic Wanderer (NGC2419) in Lynx. 10x30s, gain 305: The Whirlpool Galaxy (M51) in Ursa Major. This one I tried out max gain in an attempt to get the exposure times down. 28x4s and gain 600(max): All in all a very enjoyable session. I've missed EAA and the ASI224 is great cam. I would have imaged more but the clouds rolled in. Any comments or criticisms welcome.
  7. What settings for ZWO ASI224

    Thats great thanks.
  8. What settings for ZWO ASI224

    Having just bought one these I've been reading up a little and I've just come across this. Does this mean you can't calibrate flat frames properly due to this 'internal calibration', as they need bias or dark flats. Is seems that calibration of any sort is going to be tricky if this is happening.
  9. I'm not an expert, but it looks like the darks aren't matching very well. You've also used a lot of denoise. If you've dithered the subs maybe try stacking without using darks and see what result you get. If not it's possible to create a bad pixel map from your master dark. Nice image, love the Iris nebula!
  10. I use these after reading some recommendations, I'm very happy with them: https://www.amazon.co.uk/Olympus-FBA_8-40-DPSI-Binocular/dp/B0001M3612 As ever you have to check they fit the width between your eyes. There is a 10x50 version, but I can't vouch for them as I've not used them. They also may not be wide field enough for your taste.
  11. Hi, I'm wondering if one of these cameras has an edge as far as amp glow suppression and onboard buffering goes. Any info gratefully received!
  12. Security Light Rant!

    I've given up. I'm surrounded by them. There's one particularly bad one that I discussed with the neighbour. He has a 'right' to it it, has his family there he's away a lot etc, its less than 250w (however its obviously an superbright led). The thing is he has it at the apex of his house, it lights up the whole street and it works off movement and he's put it right next to a steam pipe. Unfortunately there's probably only me that cares, and there's other security lights in the vicinity that are just as bright, just not angled towards me. I also have have had two hotels to the north and south projecting ridiculously powerful led disco lights into the sky. Fortunately they ony seem to do it for a couple of weeks around Christmas. Weirdly, after looking at a couple of pictures of other peoples back gardens they probably have it a lot worse. I've given up on visual and just concentrate on AP and EAA.
  13. First car in space today!

    I think it's brilliant: https://mobile.twitter.com/elonmusk/status/960992715579125760?ref_src=twsrc^google|twcamp^serp|twgr^tweet