Go Back   IceInSpace > Equipment > Equipment Discussions
Register FAQ Calendar Today's Posts Search

Reply
 
Thread Tools Rate Thread
  #21  
Old 23-04-2008, 11:11 PM
Omaroo's Avatar
Omaroo (Chris Malikoff)
Let there be night...

Omaroo is offline
 
Join Date: Aug 2006
Location: Hobart, TAS
Posts: 7,639
Quote:
Originally Posted by Babalyon
Um, when I Line up the dots in my polar scope to the Trapezium and I have no drift, that should be Polar aligned, right?
Babalyon (Babylon?) - Uhmm.. no. I still reckon you're not polar aligned properly. If you were attempting to base your whole polar alignment purely by pointing your polar scope at the "Trapezium", (which I interpret you mean as Octans, at the SCP) and thinking that if you couldn't "see" it move for a while that you might be polar aligned, you need to do more. The polar scope will land you in the rough vicinity, but really isn't for getting accurate drift alignment from. You need to be well off-centre to do that - not pointing at the pole.

You need to drift align in azimuth by using a star way away from the SCP, on or near the meridian, near zenith, or straight overhead. Then you could try to drift align in elevation using a star to the east near the horizon - or if that's not easily visible then to the west. You'll need an illuminated reticle for this and use your scope's optics to detect the drift.

Just looking at Sigma Octans through you polar scope, seeing it spin slowly and assuming that if it doesn't shift too much then you're aligned won't get you aligned for anything other than 30-second (maybe) photographs. You won't get adequate magnification to see the trend - which is why you need to use the other stars and a 12mm reticle.

Your focus is out a little too. Good luck with the alignment.

Last edited by Omaroo; 24-04-2008 at 10:35 AM.
Reply With Quote
  #22  
Old 23-04-2008, 11:13 PM
Kokatha man
Registered User

Kokatha man is offline
 
Join Date: Dec 2007
Location: Adelaide
Posts: 486
Quote:
Originally Posted by Babalyon 5 View Post
Kokatha, I think the views are awesome. I am constantly amazed at how great deep sky objects look in this scope and on nights of steady air, Jupiter and Saturn have taken our breathe away. I never seem to see any unusual shaped stars or planets and I can always achieve a good focus(electric focuser). It is comparable to my LX90, the LX90 is just a bit sharper on the planets.
That would certainly lay to rest the collimation/optics faults possibility. And in live view this elongation is still evident - struth Babalyon, I cant for the life of me work this out! Not being an imager (yet.....) it seems mighty strange that visually the images are fine but on the screen they're not, with tracking seemingly immaterial judging by your comments re live view.....
Reply With Quote
  #23  
Old 23-04-2008, 11:27 PM
Zuts
Registered User

Zuts is offline
 
Join Date: Mar 2007
Location: sydney
Posts: 1,837
Well,

I gotta ask. Is the camera OK, does it still take decent images? Maybe the chip is not at right angles to the image plane, maybe the nosepiece is not flat?

Paul
Reply With Quote
  #24  
Old 24-04-2008, 08:09 AM
Kokatha man
Registered User

Kokatha man is offline
 
Join Date: Dec 2007
Location: Adelaide
Posts: 486
that and.....

Quote:
Originally Posted by Zuts View Post
Well,

I gotta ask. Is the camera OK, does it still take decent images? Maybe the chip is not at right angles to the image plane, maybe the nosepiece is not flat?

Paul
That and even stranger speculations were on my mind Paul....!
Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 02:32 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Astrophotography Prize
Advertisement