Regarding photography, you might want to start off with a dovetail adapter for your camera so you can get started with the lenses you already have.
Unless you have an exceptional HEQ5, you're not going to be able to get very long exposures with the C8, without autoguiding anyhow. Or using a reducer. Meade used to make a f/3.3 reducer for photography, but I've not used one.
Having my EQ6 drift aligned at SPSP, my C8 at f/7 was showing star trails at 10s exposures. YMMV.
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