Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

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

Equipment Discussions >> Mounts

Pages: 1 | 2 | (show all)
Skunky
sage


Reged: 09/16/13

Re: What is considered an excellent polar alignment? new [Re: Footbag]
      #6143561 - 10/17/13 07:18 PM

Epic fail with a side by side and PA with pempro...

I'm sure most of you saw my PA in pempro, if not here it is again:





Well, what I find odd is that pempro said my PA was below 1 arcmin (30 arcsec average) in both axis (5+ repeats to test for repeatability) yet I get nice long star trail shooting M2 at 30min subs. Now we know that a side by side does not affect PA. I can't believe diffraction would cause pempro to be that far off... Especially when my seeing is a 5 (excellent) this week (clean ocean air)

Back to the tried and true method of polar alignment scope (RAPAS) and drift align tonight to see how far off pempro is in a real world test....

ORTHOGONALITY? Maybe, but not that much... more testing Watson!


Post Extras: Print Post   Remind Me!   Notify Moderator  
PGW Steve
Pooh-Bah


Reged: 10/03/06

Loc: Winnipeg, Canada
Re: What is considered an excellent polar alignment? new [Re: Skunky]
      #6143665 - 10/17/13 08:23 PM

Skunky, are you guiding those 30 minute shots? Which OTA are you using?

Post Extras: Print Post   Remind Me!   Notify Moderator  
Skunky
sage


Reged: 09/16/13

Re: What is considered an excellent polar alignment? new [Re: PGW Steve]
      #6143718 - 10/17/13 08:52 PM

no guiding.. testing my pa..

Post Extras: Print Post   Remind Me!   Notify Moderator  
PGW Steve
Pooh-Bah


Reged: 10/03/06

Loc: Winnipeg, Canada
Re: What is considered an excellent polar alignment? new [Re: Skunky]
      #6143847 - 10/17/13 10:03 PM

Which OTA? If you were using that SCT without a mirror lock in one of your other pics, that is where the trails are coming from. I've got a lock on my 14" and the mirror still has a gradual shift over time, never mind one with no lock.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Skunky
sage


Reged: 09/16/13

Re: What is considered an excellent polar alignment? [Re: PGW Steve]
      #6144162 - 10/18/13 02:22 AM

HD11... I figured it out. My secondary is not square to the baffle on the HD11. The other scope on the side by side is a refactor.. and I was able to get the PA squared away..

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | (show all)


Extra information
24 registered and 35 anonymous users are browsing this forum.

Moderator:  Dave M, richard7, bilgebay 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 1637

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics