Quote:
Originally Posted by g__day
I like Celestron's Carbon Fibre tubes - means focus once set almost never has to be reset due to temperature variations.
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From last comparison i read, the case is carbon fibre only, but everything else inside (Chasis) that holds ALL your components are metal, and thus does nothing to stop temp from changing focus.
I managed to find also from ATSCOPE, were they sell the RCOS scopes, a line about the same thing :
"Note: some SCT manufacturers are now using carbon fibre outer tubes, but still fully mount and move their mirrors along an aluminium baffle tube, totally negating any benefits of a carbon composite tube assembly."
Theo.