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Astrokev

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Everything posted by Astrokev

  1. Maybe I didn't ask the best initial question! Perhaps I should've asked what is the best software combo alongside PHD2 to enable me to capture images using dithering between exposures.
  2. Yes I could do, but not sure that this can handle dithering linked to PHD2 ?
  3. Yes I have a 12v powered Startech hub, but struggles with USB3 over the 6m cable length I have. I use a Lindy active cable
  4. Thanks Steve. Yes, I've tried connecting my cam (various ZWO) using USB3 cable through a powered USB hub, but I often lose the connection - probably due to cable length being >3m. I've tried an active USB cable connecting the hub to the laptop but with little success. Not sure how to resolve this, other than to plug the cam direct into the laptop. My aim is to to have my laptop in my warm room, rather than next to the scope, but this requires longer cable runs. Any ideas to improve this would be very welcome! Thanks
  5. I currently use SharpCap for planetary / lunar SER video capture, which I am fairly familiar with. I now want to take the dive into DSO image capture using CMOS cameras (up to now I've used simple DSLR imaging for DSO). I use EQMOD to link my planetarium software, CdC, to my EQ6 mount, and use PHD2 guiding with a guidecam plugged directly into the laptop. My question is how APT connects into this system. I want to use dithering between image captures. So the stupid questions..... I presume that APT completely replaces SharpCap for image capture. Is this right? For dithering, is it OK to still connect the guidecam directly to the laptop (and not to the mount)? For software, I presume I can continue to use CdC, and PHD2 and APT link together to control dithering. For connections, my hope is that I can link the laptop to the mount, imaging cam and guide cam using a single USB cable via a hub. Is this right? Thanks for any help
  6. Thanks. Yes, I've got the 8mm adapter. I'd considered using this but I've not seen the extension tubes you mention. I'll have a browse to see if I can find any that add up to 55mm with the required M48 and M42 female fittings. Have you seen these?
  7. Hi I use the dedicated field flattener for my Esprit 100. The back focus distance to the sensor of my ASI294 must be 63mm. The sensor itself is 6.5mm from the front of the camera body, so I need an adapter of 56.5mm. Is there anyone in SGL land that has this combo and can advise on a suitable adapter or adapters for this combo, or suggest an alternative method of attaching the camera? I won't be using a filter wheel. I can't find a single adapter of this size, not surprisingly, so am probably looking at multiple rings to make up this distance. The fittings need to M66 female for the flattener and M42 female on the camera. Thanks for any help
  8. Thanks. Yeah I'm keen to have a proper go at a longer animation sequence, but haven't had a decent night since I took this one!
  9. Yes, I have WinJupos, but have not looked at it yet! I hear it's a great program though
  10. This short animation is made up of 5 images taken on 22nd Sep at approx. 15 minute intervals, spanning 1 hour. Equipment - Celestron C11 working at f/20, and ZWO ASI174MM. It would be interesting and fun to try and go for a longer duration if the clouds and seeing play nicely
  11. No, this was just a single exposure with a mono camera without filtration.
  12. Thanks . This is lifted from the BAA website I think. A really useful tool, but many finer features are not labelled. Still really good though
  13. Thanks I'll take a look . EDIT - ah yes, this is the BAA site map. I use this already, and it's excellent at showing the features at any particular time. I do think that the labelling is rather poor though. Not always clear which bit the over-laid label is referring to, and there are many feature names that some people refer to in their posts that are not labelled on this map. Still really useful though
  14. Thanks. Learning curve - tell me about it! I still haven't cracked how to get it in sharp focus. I tend to take loads of videos, refocussing each time, process the lot and choose the best 2 or 3. Nights of good seeing are obviously easier. This wasn't one of those!
  15. Just curious - can anyone suggest or recommend a decent online map of Mars? I've searched but don't seem able to find anything half decent. Thanks in hope and anticipation! Kev
  16. Mars imaged early morning on the 20th Sep. Fair bit of wind which made things a bit jittery, and fast moving high cloud spoiled the seeing as the morning progressed. Taken with my C11 at f/20 and ASI174MM.
  17. My simplistic understanding is that unity gain is the value which gives a 1:1 conversion of electron count to ADU. My newbie question is - is this the value that theoretically also gives the lowest noise in the image? For imaging of bright planets, where there is sometimes enough light to be able to use a gain setting lower than unity (depending on f ratio being used!), would this give lower noise? Therefore, in principle, does setting gain as low as possible give best control of noise? A few nights ago I started an experiment with my ASI174MM on Mars to put this to the test, but haven't completed this yet, and with the other variables involved (mainly fluctuations in seeing) I'm not sure if this will give a clear answer. Any thoughts on this gratefully received.
  18. Thanks. I did process it quite a bit, but I try and avoid creating the bright limb that often appears due too sharpening
  19. I didn't use a filter for this shot, just plain white light.
  20. Possibly my best Mars image to date, taken early morning on the 12th. Celestron C11 at f/20. ASI174MM. Good fun to use the superb BAA website map to identify some of the features. Olympus Mons is just visible in the northern plains.
  21. Thanks Craig. I'm not currently using filters, that feels like the advanced course in AP, which I'm not sure I'm ready for yet! Actually, saying that, I do use a Baader IR pass filter occasionally (this image didn't use it). Doesn't seem to offer a lot, other than to kill my frame rate!, but I'm guessing this may be partly seeing dependant.
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