Image of the day

Captured by
GERALD KREITZBURG

Eastern Veil Nebula

About Astromart

My Account

New to Astromart?

Register an account...

Need Help?

TOA 130 Collimation

Started by higbyrichard, 06/27/2011 03:34AM
Post Reply
Posted 06/27/2011 03:34AM Opening Post
Richard Higby
View public profile Send a private message to Richard Higby Find more posts by Richard Higby Find threads started by Richard Higby
Forum Member

Join Date: Dec 2006

Location: Opossum Bay, AU

Posts: 1

Has anyone had an experience collimating a Takahashi TOA scope? I am just about to tackle this as after a heavy bump stars are now Comets complete with tails.

Some post on other forums are conflicting as to whether it is possible or not. There are some indications that it is not practical with the TOA optical system. Returning the scope to Japan from Australia has to be my last and expensive option.

Thoughts or advice would be appreciated.

Richard.
Quote
Posted 06/27/2011 06:00PM #1
Louis Busby
View public profile Send a private message to Louis Busby Find more posts by Louis Busby Find threads started by Louis Busby
Forum Member
reconair's avatar

Join Date: Sep 2008

Location: Spotsylvania VA, US

Posts: 269

Get a hold of Texas Nautical Repair (TNR). They can tell you the process for Collimating the TOA or they can do it at significant cost savings over a trip to Japan. They are the only authorized Takahashi distributor/service center.

See the link:
http://www.takahashiamerica.com/index.htm
Quote
Scott Busby
A.K.A. Reconair

Carpe Noctum

Mortal as I am, I know that I am born for a day. But when I follow at my pleasure the serried multitude of the stars in their circular course, my feet no longer touch the earth.
- Ptolemy,c.150 AD
Posted 06/27/2011 08:57PM #2
Jeff Blazey
View public profile Send a private message to Jeff Blazey Find more posts by Jeff Blazey Find threads started by Jeff Blazey
Forum Member

Join Date: Aug 2006

Location: Lebanon OH, US

Posts: 173

Ouch! That sucks. If it's coma you're seeing now, elements may have gotten de-centered or wedged.

Jeff
Quote
"Don't sweat the petty things and don't pet the sweaty things" 8O
Posted 06/30/2011 05:37PM #3
Thomas Mack
View public profile Send a private message to Thomas Mack Find more posts by Thomas Mack Find threads started by Thomas Mack
Forum Member

Join Date: Aug 2005

Location: Venice FL, US

Posts: 12

Richard,
Having dealt with optics for some years now and if I owned the scope, I would remove the cell from the scope and very lightly tap around the cell with a rubber mallot to see if this will reset one of the elements which could be the problem from the hard knock. If your very careful, this should do no damage to the glass. You may have to slightly loosen the cell retaining ring first.
Quote
Posted 07/05/2011 08:09AM #4
Tony L'Hotellier
View public profile Send a private message to Tony L'Hotellier Find more posts by Tony L'Hotellier Find threads started by Tony L'Hotellier
Forum Member

Join Date: Jan 2001

Location: Warragul, AU

Posts: 10

Here are links to a couple of threads where Herr Rohr talks about recentering triplets. While he's doing this indoors it seems that you might be able to try making very small adjustments to the centre lens while obseving the coma on a real star. It's interesting reading anyway.


http://translate.googleusercontent.com/translate_c?hl=en&prev=/search%3Fq%3Dastro%2Bforen%26hl%3Den%26rls%3Dcom.microsoft:en-au:IE-SearchBox%26rlz%3D1I7ADRA_en%26prmd%3Dvdf&rurl=translate.google.com.au&sl=de&twu=1&u=http://www.astro-foren.de/showthread.php%3Fp%3D54500&usg=ALkJrhiRg1VxRsCL_FWfRPsDcnBU4_FPhA#post54500

http://translate.googleusercontent.com/translate_c?hl=en&prev=/search%3Fq%3Dastro%2Bforen%26hl%3Den%26rls%3Dcom.microsoft:en-au:IE-SearchBox%26rlz%3D1I7ADRA_en%26prmd%3Dvdf&rurl=translate.google.com.au&sl=de&twu=1&u=http://www.astro-foren.de/showthread.php%3Fp%3D41561&usg=ALkJrhj4lV1wH3rpKBURrEsNufdrau-cBg#post41561
Quote
Post Reply

Funding Member

Sponsors


View all sponsors

Search