Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.



  • Content Count

  • Joined

  • Last visited

Community Reputation

167 Excellent


About Toxophilus

  • Rank
    Star Forming

Profile Information

  • Gender
  • Interests
    Archery, Cycling (Road racing, Sportives and Time Trialing), Oh and ermm... Astronomy.
  • Location
  1. One thought is: was it mounted on an equatorial wedge or not? if so was the correct option in Autostar set for how the scope was mounted? It could have accidentally been changed at some point.
  2. Careful Jon, AP is a 'money pit' as I'm sure many here will testify ?
  3. That's awesome I love the composition and the processing. Nice one!
  4. OK as promised this is where everything that I was talking about is set. First go into your Equipment Profile Manager and select the profile you want to edit. Select the focus tab and ensure use auto focus is set and then click set to configure it Setup auto focus on filter change and disable auto focus with filter and then click the 'For Filters' button Configure the times that you want for the filters The select the guiding tab and ensure pause guiding during auto focus is enabled That should fix your problem for focusing with an OAG using narrowband filters. alternatively you could use the technique that steppenwolf has suggested which is to focus with a clear filter and then use offsets to bring everything into focus for a specific filter. The downside to that is that you need to work out the offsets for each filters (the settings are all in the dialogs that I have added) and any temperature compensation you may need. The upside is that focusing between filters will be faster than using each specific filter for auto focusing. The advantage of using each specific filter is that it will take account of any changes in your kit as temperatures or conditions change with less 'up font' work, but it will take more time out of your active capturing time. Hope this helps and Good luck, let us know you get on. Mark
  5. When I get home I should be able to have a look at where the options are in SGP. But you can set focus duration for individual filters, if you are using on exposure setting for all filters then 3 seconds probably won't be enough for the autofocus mechanism to pick up sufficient star data. Yes there is an option to disable guiding whilst performing an autofocus in SGP, again I'll see if I can find where it is in the configuration. But have a poke around its all in the the equipment profiles somewhere, but a little buried in the dialogs. Let me know if you find them before I get chance. Good luck.
  6. Hi, I've not looked at the logs as I don't have the software to analyse them available to me at the moment. The big problem with OAG's is that as you adjust the focus it changes the focus on the guide scope too. So you could have a couple of problems going on here. If the filters are not particularly par-focal then the focus may be so far off that PHD2 is not able to select an appropriate guide star or it can but the seeing was pushing the star mass out too much or it was loosing it all together. This would be apparent for just viewing the screen and your stars would be obviously out of focus or really faint. What I suspect is more likely is that as the SII filter is so strong it needs longer exposures to get sufficient data to calculate the focus on. If PHD fails to obtain focus on its initial run it pushes the focus even further to try to find focus at a different range of values. This can push the focus out sufficiently for PHD to give up as it has lost the star. With an OAG the best thing to do is (and I can't off the top of my head remember where the settings are) is to increase the exposure time for that filter and disable guiding whilst autofocus is in progress, this will avoid this issue. This does assume that your mount can hold sufficiently tight stars for say 10-15 seconds (or even more) which may be required for SII to get enough data to calculate the focus values. Hope this helps Mark
  7. Cheers Peter. I'm delighted with the end result. Some detail was lost in the finer parts of the galaxy due to the fine cloud getting in the way. but careful selection of the better sub-frames helped keep the damage to a minimum. The hardest part was getting rid of the gradients that were left from the combination of light pollution and the cloud 'enhancing' it. Cheers Bob. I'm delighted with it.
  8. This was taken as a last run with my old mount before the new owner collected it and I wanted to be sure that it was running perfectly for them as my new on is on its way. The 5 nights that I gathered data on were all plagued with fine high altitude cloud and an almost full moon, I ended up throwing a lot of sub-frames away (16 in all, just over 2.5 hrs worth). However I was delighted the the guiding and the behaviour of the mount (having recently cleaned and tuned it) and, given the challenges the seeing presented, the final image. I ended up adding some Ha data in the end just to make this a little different to my other M33 images. If you want more information the astrobin link is: https://www.astrobin.com/373994
  9. Hi Ruud, Thank you very much. It was quite a fight to get enough data in the small window I have between the trees and houses in that part of the sky especially at when I took it, it was having to wait for it to get dark enough too, narrowing the available imaging time even more.
  10. Thanks Bob! it was a bit of a game getting this one to say the least.
  11. This was taken over 4 nights between the 24th September and 6th October as I have a small windows to view objects in the south due to houses and a great big tree getting in the way. Messier 2, also known as NGC7089 is a globular cluster in the constellation of Aquarius. It is one of the largest know globular clusters and was discovered in 1746 by Giovanni Domenico Maraldi. It lies approximately 55000 ly away and is around 174 ly across.
  12. There is a contact form https://www.altairastro.com/help.php?section=contactus&mode=update. If you fill it in Ian or someone will get back to you. I messaged them via this mechanism yesterday morning and they got back to me before close of play. But after the IAS they are going to be a bit busy for the next few days I would imagine.
  13. You can never have too many Andromeda images. Nice one!
  14. Nice one. Those are a 1000x better than my first attempts at AP. Keep up the good work!
  15. Nicely done, especially if you had a battle with the dew. I must agree this is one of my favourite targets. Like the great nebula its a target that's harder that you would think to image due to the high dynamic range.
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.