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The problem with the C8 for DSOs is that with such a long focal length it will be very challenging to guide unless you have a very good mount. As well as this the f/10 focal ratio means you will have to increase your exposure times considerably. eg a 5 min exposure with an f/5 scope will mean a 20 min exposure with an f/10. You can of course get a focal reducer which will reduce the C8 to f/6.3, but even then a focal length of 1250mm is still a challenge to guide with.
As a beginner to DSO imaging I would suggest as short a focal length and a fast set of optics until you learn the ropes, so to speak. Maybe consider widefield piggyback imaging first with 50 - 200 mm lenses.
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