Here, we have rotated the Secondary Holder and have a nice, even Cowl visible all the way around the edge. None of the white background paper is visible.
This is a pretty good result. Why only pretty good? If we really look close, there is slightly more Cowl showing at the 4-5 o'clock position in the view, than in the 10-11 o'clock position. To fix that we use the leveler screws on the focuser base.
Of course this is being picky, but tweaking things like this is 1/2 of the fun of owning a telescope. This is exacting work, so you will want to be seated.
While looking through it, you can push the Sight Tube slightly in any direction and get the idea of which leveler to turn. Let the leveler screw "bite" into the wood Focuser Board a little bit. If you need more than a single turn to make it perfect, you may want to loosen the mounting screws for the Focuser itself. A single turn is as close to a hard and fast rule as we have. You will quickly get a feel for the adjustment, and again, you usually only have to do it once a year.
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_________________ Eric Webster http://www.WebsterTelescopes.com
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