RE: [APML] Laser vs. Star Collimation

["Serge Theberge" <serge.theberge@wti.on.ca>]

Ray,

Thanks for forwarding me this SCT collimation method!  It's quite
straightforward and I like the fact that you can make the adjustments on the
secondary mirror while seeing the results from the CCD without having to
move back and forth.  

On the topic of laser collimation, I had looked at Kendrick's laser
collimation method, and its seems to be sensitive to overall optical axis
misalignment, not just collimation.  In fact, the main purpose of my email
posting is to hear from APML users that have used both laser and star
collimation on SCT's and/or Newtonians, to find out what they see as the
pros and cons of laser vs star collimation and their recommendation as to
which one they favour and why.

Regards,

Serge Theberge
Toronto Centre
RASC

> -----Original Message-----
> From: astro-photo-bounces@seds.org 
> [mailto:astro-photo-bounces@seds.org] On Behalf Of RayRochelle
> Sent: Thursday, November 27, 2003 11:34 PM
> To: Discussion of Film Astrophotography
> Subject: Re: [APML] Laser vs. Star Collimation
> 
> 
> Serge,
> Here is the address for what you  are looking for I think 
> http://www.amtsgym-sdbg.dk/as/ccdfocus.htm
> There are several others also if you need them let me know
> Ray Rochelle
> ----- Original Message ----- 
> From: "Serge Theberge" <serge.theberge@wti.on.ca>
> To: "APML Mailing List" <astro-photo@seds.org>
> Sent: Thursday, November 27, 2003 5:19 PM
> Subject: [APML] Laser vs. Star Collimation
> 
> 
> > Well, it's me again looking for advice!
> > 
> > I got the understanding that good collimation is critical to making 
> > good pictures. When researching collimation techniques on 
> the web, I 
> > am getting conflicting messages - some favour laser 
> collimation, other 
> > favour star collimation.  I need to collimate my old C8 SCT 
> scope and 
> > expect that I will need to collimate (and I guess do optical axis 
> > alignment as well) of my new Vixen RS200 8" f/4 Newtonian 
> scope when 
> > it arrives.  I want to collimate my C8 for planet/moon 
> photography and 
> > the RS200 for deep space photography. Any advice you can give me or 
> > reliable sources you can forward me to?
> > 
> > Thanks in advance,
> > 
> > Serge Theberge
> > Toronto Centre
> > RASC
> > 
> > 
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