Orion SkyQuest XX14i
"The heavens declare the glory of God; the skies proclaim the work of his hands." Psalms 19:1
Quote:Thanks for the info Don. I hope that I never have to go thru that!
Quote:On mine i disasemble the 6 metal+ cork pad and put some thick adhesive tape (1mm) around the baffle. Because it's better to maintain the primary Mirror by the center (like SCT's)I put the same thickness between the adhesive tape and the hole in the Mirror. It's an absolute performer now.
Refractors Reflectors Two Cats A few eyepieces
Bruce Vixen Visac VC200L AT65EDQ CGEM DX - hypertuned by Deep Space Products Atik 460EX mono w/EFW2 Astrodon Gen2 LRGB Astrodon 3nm Ha,OIII & SII Canon 500D (Gary Honis modified) Point Grey Chameleon (mono) Orion SSAG Ibuprofen Meadowlark Ridge Observatory http://www.flickr.com/photos/o...s/72157628590128971/
Quote:Glad you worked things out as well! I'd like to see some images taken with your modified Vixen.
I've actually gone through the collimation process numerous times - but my old 1 1/4" laser used in a 1.25 - 2" adapter was just enough off (even trying various orientations) that the focuser was not really looking at the center of the secondary.
Doesn't sound like too big a deal until you adjust the secondary to fold back an off-center beam. That results in a tilted secondary and astigmatism. I struggled with slightly elliptical images for quite a while.
Just before writing the original post I picked up a 2" Glatter laser and it showed no variation when rotated in the clicklock visual back. Centering the beam in the spider correctly then effectively centers the secondary and the rest was easy. Now nice symmetric images.
Ya gotta start with the focuser and then progress through the optical path. You can't jump around or start with the secondary etc. just doesn't work. Just as you found out.
Also, there have been several reports now of these scopes arriving with tightly mounted primaries. Whoever was assembling these must have been having some bad days!
Thanks for the nice comments and for sharing your experiences with these unusual scopes.
Quote:I was told the mirrors are dielectric coated. Don't know if that is true. If so, they would be difficult to scratch.