Yes, by the easel's base - with a sacrificial piece of printing paper on the easel. The Peak/Micromega eyepiece focuses, and also swivels vertically.
Corran, once you use the focuser it won't matter how it works. It just works. Focus upon the grain and be happy. An interesting application is to get the grain in focus, then stop down the lens to watch for focus shift (should not happen), and see when the grains mushes out due to diffraction.
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