jpvignes We can discuss about everything 🙂
I talked to the Baader guys about spectroscopy, and essentially they told me these things:
- We will want a "good" spectrograph, which alone would cost 10.000 Euro upwards (it needs a camera, too). The less expensive ones simply have not enough resolution
- Resulting from the first point, one wants to have as much aperture as possible to gather as much light as possible. Otherwise you either restrict yourselv to bright targets, or need very long exposure times
Now, a spectroscopy-only system might cost somewhere around 60.000 Euro (using a CDK17). The big question would be how much we would be able to rent it. I fear that such a very specific system would stay idle for too long, but I may be wrong.
We could also create a combination system with an instrument swapper at the back:
How cool is this! We could mount the spectrograph, a classic imaging camera with filter, and maybe even a planetary imaging camera on three interchangable ports. So we would have a system able to operate on spectroscopy, photometry, pretty pictures and even planets. This, however, at a cost: The afermentioned CDK17 in such a configuration would cost nearly 90.000 (!), and due to backfocus constraints, one can either use the CDK17 or CDK24 to make it work. I dunno. Would be very cool 😀