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search for a guide to collimating an SCT and that will set you right mate.. If you can collimate a newtonian, you will laugh at how simple the SCT/RC is in comparison.. The only thing with the RC is that "Close" is not good enough. Collimation is of the utmost importance with the RC design.. With an SCT reduced to F/6.3, close collimation is generally good enough to get a decent image. with an RC **Perfect** collimation is generally the only way to get good looking stars. Don't let that phase you.. its easy enough. it just takes a little doing..
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