#1  
Old 20-10-2012, 09:23 PM
Joshua Bunn's Avatar
Joshua Bunn (Joshua)
Registered User

Joshua Bunn is offline
 
Join Date: Oct 2011
Location: Albany, Western Australia
Posts: 1,093
heat from laptop?

Trying to design my RORO, as best as i can. Has anyone noticed image distortion while the scope "looks" directly over the top of the laptop while its running and so distorting the view from the mild stream of heat. Or is this just a non issue? The laptop would probably be 1.5m away from the end of the scope on my design so far.

thanks
Josh
Reply With Quote
  #2  
Old 21-10-2012, 12:18 AM
rogerg's Avatar
rogerg (Roger)
Registered User

rogerg is offline
 
Join Date: Feb 2006
Location: Perth, Western Australia
Posts: 4,540
I say non-issue.

Others will likely disagree with me but I often put comfort ahead of such minute interferences. It used to be the case (and may still be) when I was building my observatory that people would get very finicky about the tiniest detail which in reality makes little difference to astronomy but has a big offset in comfort or convenience. I tend to sway the other direction a little, perhaps my images suffer but I have never found a difference.

I wouldn't even think twice about the heat from a laptop or computer.

Roger.
Reply With Quote
  #3  
Old 21-10-2012, 07:30 AM
gregbradley's Avatar
gregbradley
Registered User

gregbradley is offline
 
Join Date: Feb 2006
Location: Sydney
Posts: 15,410
I think its unlikely. Perhaps if you were imaging at 3 metres you'd notice it. Shorter focal lengths most likely not.

I use a little gas heater under my table at my dark site observatory as it can get quite cold at times and I have never noticed any effect in images even though the scope is not too far away over it at times. And that's a little portable gas heater. I'd say in my case what little heat does rise is quite dispersed by the time its near the scope lens as its abotu 1.5 metres or more. Also its only very occassionally the scope is directly over it, usually off to one side.

I wouldn't put a heater under a long focal length planetary imaging machine though.

I agree with Roger, unless you are a planetary imager I doubt you would pick it up. Seeing,exact focus, good collimation and accurate tracking are the key things.
Greg.
Reply With Quote
  #4  
Old 21-10-2012, 10:07 AM
asimov's Avatar
asimov (John)
Planet photographer

asimov is offline
 
Join Date: May 2005
Location: Bundaberg
Posts: 8,819
Certainly an issue for us planet imagers. I can see the effect with IE Jupiter on the screen @ F10 (2800mmFL) with the SCT.
Reply With Quote
  #5  
Old 21-10-2012, 03:59 PM
Joshua Bunn's Avatar
Joshua Bunn (Joshua)
Registered User

Joshua Bunn is offline
 
Join Date: Oct 2011
Location: Albany, Western Australia
Posts: 1,093
Thanks everyone, your points are appreciated.

Josh
Reply With Quote
  #6  
Old 21-10-2012, 04:23 PM
Poita (Peter)
Registered User

Poita is offline
 
Join Date: Jun 2011
Location: NSW Country
Posts: 3,585
For planetary, placement of my laptop, myself or even the power supplies can be enough to cause issues, all are well behind my scope when I image.

On another note, the cooling fan addition to the C9.25 made a huge difference to planetary imaging as well.
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 01:05 PM.

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