NavList:

I've adjusted my recently acquired SNO-M and am pleased, but I haven't found anything about the consequences of small alignment errors where the scope points above or below the mid-line of the horizon mirror.

With the two halves of the tube eyeball-straight, looking back along and through the tube seems to place the sight line about 2mm above the horizontal mid-line of the horizon mirror.

How does this affect the view? The only adjustment is to put in a down-angle between the eyepiece side and the objective side of the scope, and I don't know what sort of measurement reference to use.

Thanks,
Richard
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