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focuser install questions

Started by GeorgeK, 04/10/2002 10:56AM
Posted 04/10/2002 10:56AM Opening Post
Hi all
I will replace the focuser on my 12.5 dob with another one soon. the uppper cage is sonotube- Are there any tricks to ensure proper alignment of the new focuser that someone is willing to share? I think the current focuser is properly aligned, and I was thinking about removing the secondary mirror and marking a spot on the far wall of the tube with my laser and using it as an alignment mark for the new focuser (both focusers are 2 inch format). does this sound reasonable? thanks