Quote:
Originally Posted by Marke
The CF does hold focus better but the steel tube will cool much quicker .
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Really... are you sure about that?
One of the advantages of CF is that it has a very low thermal mass (meaning it doesn't have to transfer a whole lot of heat energy to the air to reach thermal equilibrium)
That is not to say that all CF tubes are created equal.
The percentage of epoxy and filler content obviously has an impact on performance and varies from manufacturer to manufacturer...
But yes, tough call as to whether a good ascom compliant focuser with temperature compensation might be a better way to spend the extra cash.
~c