Quote:
Originally Posted by pluto
Is reinforcing the focuser area on the tube something that people do often or is it nessesary to buy an OTA with the focuser reinforced already?
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Ideally get a CF tube thick enough. Otherwise I reckon you could mount the focuser assembly on additional tube rings if it's going to be too heavy. At f/4 any flexure will kill your collimation. It's a world of pain.