Re: [APML] 3 New Images - another question

["Jim Ives" <flyboy@bignet.net>]

Steve, The blue ring is from the focal reducing lense in the OAG, I think. Take a look at this one I took of M45 with the focal reducing lense in place. It shows the same ring. I think it's pretty though and makes it more interesting. Sort of like the difraction spikes caused by a newt reflector.  http://flyboy999.freeyellow.com/Star%20Clusters/M45_jpg.htm

 

Jim

----- Original Message -----

From: Steve Lindsey

To: APML

Sent: Friday, October 19, 2001 9:09 PM

Subject: [APML] 3 New Images - another question

For those SCT users... I wondered on the horsehead shot where the blue ring on the righthand side of the image came from?  Some kind of internal reflection between mirror and corrector plate?  Take a look:

 

http://www.geocities.com/stevelindsey2001/Horsehead.html

 

Steve