Click here if you are having trouble logging into the forums
Privacy Policy |
Please read our Terms
of Service | Signup and
Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User
Eddgie
Postmaster
Reged: 02/01/06
|
Re: Star Test on SCT
[Re: mattflastro]
#5626596 - 01/16/13 05:06 PM
|
Edit
|
Reply
|
Quote |
Quick Reply
|
|
|
Well, I apologize for any misunderstanding on my part.
|
mattflastro
Vendor - Astrovideo Systems
Reged: 07/31/09
Loc: Brevard County , FL
|
Re: Star Test on SCT
[Re: Eddgie]
#5629094 - 01/17/13 11:08 PM
|
|
Edit
|
Reply
|
Quote |
Quick Reply
|
|
|
Quote:
Well, I apologize for any misunderstanding on my part.
No need to apologize for such a small thing , I should be apologizing as well but on a more serious note your star testing skills and knowledge are amazing .
|
Julio
sage
Reged: 01/18/07
Loc: Pembroke Pines ,FL
|
Re: Star Test on SCT
[Re: Julio]
#5629809 - 01/18/13 11:55 AM
|
|
Edit
|
Reply
|
Quote |
Quick Reply
|
|
|
I guess the lingering question is does the scope meet the difraction limited spec? 
Edited by Julio (01/18/13 11:59 AM)
|
Eddgie
Postmaster
Reged: 02/01/06
|
Re: Star Test on SCT
[Re: Julio]
#5629836 - 01/18/13 12:07 PM
|
|
Edit
|
Reply
|
Quote |
Quick Reply
|
|
|
Unless you have some reason to suspect that there is a serious error, then I would say that it is improbable that it has a flaw so serious that the scope is no longer diffraction limited (which in itself is rather vague, but is generally understood to equate to a Strehl of .8).
While your test was not done to the standard necessary to give a meaningful quantification of the errors I mentioned (maybe a bit of SA and a small zone) neither looked serious.
Your choices are to do more testing and attempt to quantify the error, or just start using your telescope and forget about it. I did not see a serious error in the scope.
If you want to see more tests, I recommend you go to this web site. It has plenty of star tests with different errors shown, and as you will see, your scope's test looks to show a scope with typical SCT quality. Not bad, but not great, and and almost always much better than diffraction lminted .8 Strehl) from Celestron.
Astro-Foren Test Directory.. Never seen a Celestron below .8, and most are .9...
There is also the Roddier test.
But you are wasting your time. Nothing in your test suggests the telescope is a lemon.
Edited by Eddgie (01/18/13 12:22 PM)
|
|
11 registered and 19 anonymous users are browsing this forum.
Moderator: Cotts, Starman27
Print Thread
|
Forum Permissions
You cannot start new topics
You cannot reply to topics
HTML is disabled
UBBCode is enabled
|
Thread views: 1827
|
|
|
|
|
|
|
Previous
Index
Next
Threaded
