Hi
anyone out there ever added shims to their OTA dovetail ?
I'm looking to add shims to get my C11 perfectly orthogonal. I've found guidance for our northern cousins and am wondering it there any for the southern hemisphere instructions? Here's what I have for Northern hemisphere. Should I reverse it for us?
Once you have Polaris centered, flip the OTA to the west side, and set the RA so that the weight shaft is parallel to the ground.
If your mount is orthogonal, then as you tip the mount in Dec, Polaris should perfectly center in the field.
If it does not, then you have some cone error.
If the miss is such that the star passes to the right side of the field (I would look though a straight though finder to see where it went and avoid diagonal reversal) then the fix is to place shims between the rear ring and dovetail.
If the miss is to the left, shim at the front.
Thanks for your expert advice!
Regards
Dom