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Gerry Casa Christiana

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Everything posted by Gerry Casa Christiana

  1. Gerry Casa Christiana
    Yes the secondary on the SW is 65mm? Or 60 I forget. Better for planets. Yes I have eq6. Do you have this scope Alacant?
  2. Gerry Casa Christiana
    Hello all Just a quick question. I'm looking to upgrade my scope to a 10" but F5 Newtonian. Just wondered if I missed any online apart from Skywatcher GSO Orion. I've kind of been hoping for a carbon fibre but they tend to be expensive. I was also considering building one but that seems just as expensive. Any options I've missed? I would like to spend under 900 quid if possible. Cheers Gerry
  3. Gerry Casa Christiana
    So 138 divided by diameter of telescope in mm
  4. Gerry Casa Christiana
    Ah that. The pixel resolution of camera and scope. Just lost me with the Rayleigh didn't realise that was the tee for resolution of the telescope.
  5. Gerry Casa Christiana
    Great shot. Can I ask how do you work out the Rayleigh limit for a given telescope. Go on tell me to get on my bike Thanks Gerry
  6. Gerry Casa Christiana
    Blues looking good!
  7. Gerry Casa Christiana
    Obviously longer exposures with guiding make a big difference too. Also I wasn't using flats in those days BUT I know for example the California nebula I could barely see it last year. Now it's easy.
  8. Gerry Casa Christiana
    Same setup from last year except guiding and camera modded. I've noticed a very big difference personally especially in the h Alpha objects.
  9. Gerry Casa Christiana
    Tried all of that but no success. I think I ruined the collimation on the night when doing a star test. So the stars won't actually line up at all! Lesson learnt!
  10. Gerry Casa Christiana
    I'm going to try it! Thanks!
  11. Gerry Casa Christiana
    I'm having problems (maybe because I didn't use super pixel mode) to save in mono. When I delete the green and blue channels it won't let me save in anything except a PSD file. There is no option for tiff. I'm using CS2. I'm also having problems when I copy and paste the rgb onto h Alpha. They don't line up perfectly and I see rotate but it needs fine adjustments. Is there also a transparency option so I can see through one picture to another? Sorry for the questions. Maybe I should do it on a separate thread. Only if you have a quick answer
  12. Gerry Casa Christiana
    Hello all. Did some frames in H Alpha on my dslr last night for the first time. Any way in particular to stack in DSS? I did flats and bias. Thanks Gerry
  13. Gerry Casa Christiana
    Can I ask how you actually remove the tube. Is there a screw? Thanks! Gerry
  14. Gerry Casa Christiana
    http://www.sensorgen.info/CanonEOS-1100D.html in fact if you look at the read noise for your camera you can get away with bumping up the ISO. Try it you will be suprised by the results. Yes I know about losing dynamic range but in the beginning I got pictures like this with no guiding and no modification.
  15. Gerry Casa Christiana
    As your doing shorter exposures. I would bump up the ISO to at least 1600 you could even try 3200 a lot of my pictures in the beginning on a non modified camera were like that. Yes you get more noise but with processing you can sort it out.
  16. Gerry Casa Christiana
    Can I ask what constitutes widefield. Thanks Gerry
  17. Gerry Casa Christiana
    Still good! The next time check your focus a little more. You have double defraction spikes which is usually just being slightly off focus. All the best
  18. Gerry Casa Christiana
    Hello Can I ask did you use oxygen for the blue as well? Great picture I want to revisit it because I tried without guiding and hope to get a better result.
  19. Gerry Casa Christiana
    Does that mean I need to choose Kappa Sigma Clipping for lights or just Bias and Darks? Thanks Gerry
  20. Gerry Casa Christiana
    Just to say to all that last night I auto guided for the first time. I do have to be honest though and say it took me 3 hours to work with PHD2 and then the line graph jumped over all the place. Not sure if it was right but I managed 4 subs of 420 seconds of the Markarian Chain and the stars seem perfect. Hopefully it's right. The only problem I have now is meteorites! Anyway I hope that guiding is not always going to be long winded. Thanks for all the help. If you know of the settings for PHD2 let me know. Gerry
  21. Gerry Casa Christiana
    Yes your absolutely right I just had trouble getting the adapter as mine is 30mm in diameter. Thats a great picture. What is it? I wouldn't mind trying that myself but it looks like you used h alpha and sii? I don't have any filters like that yet. Gerry
  22. Gerry Casa Christiana
    God willing I too would like a nice apochromatic refractor but as I'm new to it I want to get the most out of what I have.
  23. Gerry Casa Christiana
    Hello all Well I have got my guide scope. I went with the qhy mini guide scope. In the end I got it from Modern Astronomy http://www.modernastronomy.com/shop/accessories/qhy-accessories/qhy-miniguidescope-kit/ Really good people I got mine delivered from the Uk to Italy in one day! I would have bought it from FLO if they had it. Well does it work do you ask? I've had it a week now at least but the moon! and now it's been raining! So I'm still waiting. I blame global warming and every person with a 4x4 just kidding. Yes just going to have to be patient. Not my greatest talent. I'll post my results when I get it going. Gerry
  24. Gerry Casa Christiana
    It's useful for those who want to do Astrophotography and especially long exposures as usually the mounts themselves do track but depending on the mounts accuracy you might get 2 minute exposures like on mine. With the autoguider you add it so the accuracy of the mount can be kept perfectly centred on your star. So it makes small adjustments for you. The 1:3 focal length is no longer necessary as computers have come a long way and that is now out of date. So a small scope with a mono webcam is sufficient. Very basically speaking! Kind regards Gerry
  25. Gerry Casa Christiana
    I just had delivered a QHY mini guide Scope. I intend to try it tonight if the sky is clear but thanks!
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