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As I said, something is wrong if you have to rack the focuser fully in,
regardless of the ambient temperature. Its analogous to the focus
adjuster on a lens going beyond infinity to allow for expansion or contraction of the lens. I've never seen a focuser that comes to focus at less than 5 or 6mm from from fully in. My newt focuses at 12mm racked out.
raymo
Last edited by raymo; 16-06-2018 at 11:06 PM.
Reason: more text
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