Hi!

Yes, there's the full set of keywords, like in mine when doing photometry. It seems to me as if the issue is which camera does the platesolving. Jasem says he'll be back on this in two weeks time, that's very good.

Concerning the spectrographs - I'm not sure I follow you here, about tubes and entrance diameters. In my mind, what matters most here are if the spectroscope is very well collimated (otherwise light is lost) and how well you are able to position the star on the slit. And of course slit width. I tend to use 20 um on my Lowspec and 23 on my StarEx. If you use SimSpec, the spreadsheet, you can learn at lot about these parameters.

As for gain: I go for as large full well as possible. I used to use higher gain, but experienced some comparison stars to become saturated at times. WIth a gain of 20 on my WHY283m, I have not experienced that. I don't know how to see what gain others use though. But I must confess that I don't really understand much about gain - I just trust experience and my expert friends

Magnus

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