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Marc,
Yes, things get a little more complicated and complex when you move into serious slit spectroscopy.....
A bit like AP, you can start with a DSLR on a tripod....but once the bug bites you end up with precision mounts, guiding headaches and sophisticated cooled CCD camera - and the associated $$$ software.
The C11 set-up is a dedicated spectrograph set-up - I don't think I've ever "looked through" it for four years!
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