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Hi Rowland,
You managed to get an interesting thread going....
I have an st4000xcm and I love it. I have used it on a variety of scope and focal lengths. I have it currently mounted on an Astro Physics 130 f6 refractor, but I have used it on a vc200 at 1800 and 1260fl, a vixen fl102 refractor at918fl and a william optics triplet refractor at 480mm. My buddy had it mounted on his rc at 2800fl as well for a while, All worked well.
One advantage of this camera is because it is one shot colour, you can use adaptive optics with the internal guide chip. No OAG needed. I get a -35 delta cooling, dessicant needs charging once a year (this time when I charged it I filled the chamber with argon as well).
It is by no means sensitive, better than some osc cameras, worse than others. A lot worse than most mono cameras though. There is noise, but it is not too intrusive.
It has not missed a beat since in the 2 years I have had it. And I have done a lot of imaging with it, as my observatory is automated enough to do data collection all night unattended.
Check my posts here on iis to see some of the imaging I have done with it.
Brett
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