Jump to content

Banner.jpg.b83b14cd4142fe10848741bb2a14c66b.jpg

alacant

Members
 View Profile  See their activity

  • Posts

    6,223

  • Joined

  • Last visited

  • Days Won

    4

 Content Type 

Everything posted by alacant

  1. alacant
    Hi. No. Decide where best you want it e.g. if you have a rectangular sensor, the centre of a long side is a good choice. Now take flat frames pushing the prism toward centre field until you see its shadow. Then back off a little. The idea is that you can rotate the oag to pick different guide stars but unless you're at a very log FL or you have an old guide camera, choose maximum prism insertion and leave be. HTH
  2. alacant
    ? It IS a ts oag: https://www.teleskop-express.de/shop/product_info.php/language/en/info/p2722_TS-Optics-Off-Axis-Guider-for-Canon-EOS-cameras---replaces-the-T-ring.html How is yours different?
  3. alacant
    No. HTH.
  4. alacant
    Hi everyone IMHO, we need to give the OP a snap of one which is working, no? HTH
  5. alacant
    It can be quite alarming when you look at the diameter but it's really the area you should be comparing. What is even more alarming is how much light is lost by bypassing small secondaries altogether. We found out by accident by pointing a reflector we were upgrading at the sun. You could burn paper held at the open end of the tube by the light that was missing the secondary altogether! There's an article on it here. I don't see why photographic newtonian manufacturers insist on having the focal plane so far out from the tube wall. Having a low profile focuser with a smaller secondary would be far better. Yeah, I know TS do it, but at €silly. Cheers
  6. alacant
    Hi. Yes. No problem. I mentioned it only because you may think the vignetting excessive (if you've tried say a slower reflector) and blame it on the cc. For reference, the secondary fitted to our 8" is 85mm. Cheers and HTH.
  7. alacant
    Hi again. No. The filter must go either on the nosepiece of the cc on the telescope side. If you want it between camera and cc you'll need a clip in type. **You could attach a 48mm filter to the male thread on the camera side of the cc but hey, spacing is critical;) HTH
  8. alacant
    Hi. We use it with aps-c and an ES f3.9. It covers the whole fov but with the small secondary on the quatrro, you'll see a lot of vignetting. HTH,
  9. alacant
    Not sure; blue and red curves?
  10. alacant
    Hi I don't think it's a regular collimator is it? Instead, how about a simple Cheshire sight tube? One with cross hairs so you can get the secondary in place, even better. No need to square anything or do a star test. Have another read of the collimation myths: If you want perfect -small- stars right into every corner, it's gonna have to be the 4 element gpu But IMHO, just as well correcting coma and tilt in software. Anyway, good luck and clear skies.
  11. alacant
    Hi. Be sure to read the collimation myths before you agonise a moment more;)
  12. alacant
    Hi. On a dedicated camera, £600 buys you a miserably small sensor whereas £400 gets you an astro modified dslr with a big aps-c sensor. It depends upon what you want to photograph. HTH.
  13. alacant
    +1. To make it less so, be sure to obviate the need for allen keys -tilt- and place a teflon plastic milk carton washer -rotation- between the secondary stalk and the three adjusters. HTH.
  14. alacant
    Too late!
  15. alacant
    Almost there then. Well done?
  16. alacant
    Hi everyone Six months on now so just a curiosity check to ask if anyone has managed it yet. As it is seemingly as impossible as astro-photography itself, I thought that someone else may have photographic evidence... <latest advice> Please don't burden your attempts with old computers or SBCs with little or no clout. ASCOM on an i7 gaming machine is difficult enough. Multiply that several fold and you have an idea of how difficult INDI is going to be on anything less. Or is it? </latest advice> Did you hear the one about the guy who posted a newbie question on a Linux forum? Is that provocatively challenging enough I wonder?! As it's a festive time of year, here's a shot of my hastily-thrown-together-wide-field-takumar-200 INDI setup used for the comet. Merry Xmas everyone.
  17. alacant
    Hi. Good advice:) Another way I've found is to use an OAG with PHD2's PPEC. HTH
  18. alacant
    Hi. 35mm. HTH.
  19. alacant
    You're making me feel guilty now! I focus once on a bright star at the start of the session and leave it there all night. Is expansion and contraction -that is what we're talking about I think (???)- enough to make a difference? Sorry, now I am off topic.... Cheers and clear skies anyway.
  20. alacant
    Hi. Have the camera oriented at 90º to the focuser. This way the galaxy fits across the diagonal. Don't know what camera you have but at 650mm, even an aps-c dslr can't fit in the whole galaxy. If you have the sw 0.9cc, things are a little better. HTH and good luck
  21. alacant
    Hi everyone. Just my occasional bump to ask if anyone has managed the switch yet. If you have, do tell your story. Cheers and clear skies.
  22. alacant
    It's fine. A good start and there's loadsa time left still this year:)
  23. alacant
    Yes, I wish. I've my eyes on a asi294. One day perhaps...
  24. alacant
    Hi everyone. I'd expected better for over 3 hours of light frames but at least you can see what it is:) Thanks for looking and any processing tips for this one most gratefully received. Canon 700d using 5 minute snaps
  25. alacant
    Ideal. Ubuntu, indi and ekos will install in seconds, blink and you'll miss Siril stacking and StarTools will fly. A one stop ap box:)
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.