#1  
Old 26-07-2015, 05:47 PM
AlexN's Avatar
AlexN
Tunnel Vision

AlexN is offline
 
Join Date: Mar 2008
Location: Brisbane, Australia
Posts: 6,708
guiding thoughts.

having had some recent dramas with guiding I've been putting a heap of thought into guiding and my options.

Currently I use sbig self guiding and it seems to work very well during exposures up to 30 minutes duration however it would lose its mind during image download. On the odd occasion it does overcorrect..

I have considered the following 3 options and would like to hear thoughts.

1. Sbig AO-7 / AO-8 (however I do fear that I will get the same good performance during exposures and then having it go crazy during image downloads.

2. Qhy5 or the like via an OAG or external guide scope.

3. This is a bit of a long shot shot.. But how about guiding the mount via a Qhy5 and external guidescope while using ao7/ao8 @ 7~8hz to chase seeing


My sbig doesn't have a remote guide port.. I need to spend more time at the scope hopefully this week to determine the cause of this problem however I honestly feel there is some interference somewhere causing the camera to feed the mount a 5 second long guide correction during image download.

Any thoughts.
Reply With Quote
  #2  
Old 26-07-2015, 06:59 PM
Peter.M's Avatar
Peter.M
Registered User

Peter.M is offline
 
Join Date: Sep 2011
Location: Adelaide
Posts: 914
Quote:
Originally Posted by AlexN View Post
having had some recent dramas with guiding I've been putting a heap of thought into guiding and my options.

Currently I use sbig self guiding and it seems to work very well during exposures up to 30 minutes duration however it would lose its mind during image download. On the odd occasion it does overcorrect..

I have considered the following 3 options and would like to hear thoughts.

1. Sbig AO-7 / AO-8 (however I do fear that I will get the same good performance during exposures and then having it go crazy during image downloads.

2. Qhy5 or the like via an OAG or external guide scope.

3. This is a bit of a long shot shot.. But how about guiding the mount via a Qhy5 and external guidescope while using ao7/ao8 @ 7~8hz to chase seeing


My sbig doesn't have a remote guide port.. I need to spend more time at the scope hopefully this week to determine the cause of this problem however I honestly feel there is some interference somewhere causing the camera to feed the mount a 5 second long guide correction during image download.

Any thoughts.
What software are you using? because it seems to me you are inventing expensive ways to fix a trivial problem. Most packages have either "exposure delay" or "wait for guider to settle" parameters, which will stop the camera exposing before the guide is back on tasl
Reply With Quote
  #3  
Old 26-07-2015, 07:40 PM
AlexN's Avatar
AlexN
Tunnel Vision

AlexN is offline
 
Join Date: Mar 2008
Location: Brisbane, Australia
Posts: 6,708
I'm using ccdsoft 5.

The drama is that I can guide for 30 minutes without dramas but the first time it downloads an image it pushes the guide star completely out of frame in a random direction so no matter how long I make the pre exposure delay the guide star is gone.
Reply With Quote
  #4  
Old 27-07-2015, 04:55 AM
Peter.M's Avatar
Peter.M
Registered User

Peter.M is offline
 
Join Date: Sep 2011
Location: Adelaide
Posts: 914
Quote:
Originally Posted by AlexN View Post
I'm using ccdsoft 5.

The drama is that I can guide for 30 minutes without dramas but the first time it downloads an image it pushes the guide star completely out of frame in a random direction so no matter how long I make the pre exposure delay the guide star is gone.
The other thing I would be doing before looking into these fixes is isolating the USB, dont run the camera through a HUB if you are. I have never used CCD soft, but the other software option is "pause guiding during image download" if you can.
Reply With Quote
  #5  
Old 27-07-2015, 08:30 AM
Paul Haese's Avatar
Paul Haese
Registered User

Paul Haese is offline
 
Join Date: Jan 2009
Location: Adelaide
Posts: 9,430
Time to upgrade to a current software package Alex. PHD2 or Maxim have the functions Peter is talking about and that will solve your guiding issues.
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

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 11:39 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
Lunatico Astronomical
Advertisement
Celestron Australia
Advertisement
Bintel
Advertisement
Astromechanics
Advertisement
Meade Australia
Advertisement
SkyWatcher Australia
Advertisement
OzScopes Authorised Dealer
Advertisement
Astronomy and Electronics Centre
Advertisement