#1  
Old 15-09-2015, 09:33 AM
pmrid's Avatar
pmrid (Peter)
Ageing badly.

pmrid is offline
 
Join Date: May 2008
Location: Bribie Is.
Posts: 3,127
QHY5-II banding

Anyone come across this? It's a band across the image bottom 20% or so. I can't find a cause and it's giving me the willies. The band is much brighter in a FITS image. For some reason, turning it into a JPG for posting here has subdued it almost to vanishing point. But when in use as an imager, it is almost white.
`
Peter
Attached Thumbnails
Click for full-size image (Autoguider Image.jpg)
16.9 KB26 views
Reply With Quote
  #2  
Old 15-09-2015, 09:46 AM
AlexN's Avatar
AlexN
Tunnel Vision

AlexN is offline
 
Join Date: Mar 2008
Location: Brisbane, Australia
Posts: 6,708
Is it directly connected to a computer or a usb hub? Possible electrical interference from a powered hub or an unshielded unpowered hub.

I used to get that sometimes using the Qhy5 in ccdsoft when it was set to high priority downloading.
Reply With Quote
  #3  
Old 15-09-2015, 12:22 PM
pmrid's Avatar
pmrid (Peter)
Ageing badly.

pmrid is offline
 
Join Date: May 2008
Location: Bribie Is.
Posts: 3,127
Quote:
Originally Posted by AlexN View Post
Is it directly connected to a computer or a usb hub? Possible electrical interference from a powered hub or an unshielded unpowered hub.

I used to get that sometimes using the Qhy5 in ccdsoft when it was set to high priority downloading.
Hi Alex.
yes. It goes through the same powered hum as the main imaging camera. I wondered about that but dismissed it because a plain old QHY5 (before they got fancy) didn't exhibit that sort of banding.
Peter
Reply With Quote
  #4  
Old 15-09-2015, 01:47 PM
AlexN's Avatar
AlexN
Tunnel Vision

AlexN is offline
 
Join Date: Mar 2008
Location: Brisbane, Australia
Posts: 6,708
Give it a go on its own lead and seebwhere that gets you. I'm looking at buying a guide camera this week. Let me know if you manage to resolve this. I'm pondering a used Qhy5 vs Qhy5 II or Qhy5L II.
Reply With Quote
  #5  
Old 15-09-2015, 02:21 PM
pmrid's Avatar
pmrid (Peter)
Ageing badly.

pmrid is offline
 
Join Date: May 2008
Location: Bribie Is.
Posts: 3,127
Quote:
Originally Posted by AlexN View Post
Give it a go on its own lead and seebwhere that gets you. I'm looking at buying a guide camera this week. Let me know if you manage to resolve this. I'm pondering a used Qhy5 vs Qhy5 II or Qhy5L II.
Just to clarify - this one is the L-II version.
I'll see if I can give it a run on its own lead. I have one of those USB powered leads I might use.


Peter
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 12:37 PM.

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