[Chaos-l] focuser installation

[Mark South]

Hi I consulted with Greg and here is what he said...


"In terms of focusers, make sure the height (rack in) is the same as  
the old focuser, otherwise you will move the primary up or back or  
recess or raise the focuser somehow.   If you don't do this it may not  
focus or may not focus for every eyepiece"

Hope this helps
South
  from my cell

On Jun 18, 2009, at 1:30 PM, Michael Hrivnak <mhrivnak at hrivnak.org>  
wrote:

> I got a new (to me) focuser in the mail today. It's a GSO crayford  
> 2" single-speed focuser that I picked up for cheap on astromart. It  
> was allegedly pulled off of a 12" Hardin dob, but the curvature fits  
> my 8" dob perfectly.
> I want to install it on my 8" Orion dob, which is one of the older  
> sonotube ones. This will replace the terrible R&P 1.25" focuser it  
> came with.
> Any advice? How do I get it perfectly square? Also, I'm looking for  
> a piece of thin sheet metal or something similar to make a back  
> plate. Any suggestions on that?
> Thanks,
> Michael
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