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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…


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

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