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Greg Marshall's Blog – May 2012 Archive (1)

"PerfectStar" Focus Controller

Astro photographers all know that perfect focusing is both essential and difficult. A motorized focuser is a big help because it allows finer control while avoiding the vibrations typically induced by turning a focus knob by hand. However, simple DC motor systems cannot provide enough precision and absolute positioning systems using stepper or servo motors are usually very…

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Added by Greg Marshall on May 28, 2012 at 11:16am — No Comments

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