Thanks for the replies.
How much sensitivity loss are we talking about here for colour vs mono? Or to turn the question around, under what conditions would it be more likely to fail for colour than mono? I also now wonder whether the kit I linked includes the colour version or mono...
Also, I have been following that Auto guider thread, but didn't want to derail it with my specific questions.
I'm not overly concerned about the planetary camera aspect at this time, so the compromise is not a problem for me. At least I'll be able to use it for learning purposes anyway.
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