[Martin Pugh]

I guess what I am asking, is that if you look at the Cloud Sensor data at Siding Springs, it states that the sky 'ambient' temp (which is a measure of the clarity of the sky) is a rather fantastic -50! Then looking at River Dingo, their Cloud Sensor data reported -30, still very good.

But how do you think this difference in temp and therefore the difference in the clarity of the sky would show up in an exposure? Doesnt really matter about the telescope or camera, but assuming a 30 minute exposure was taken of the same object using the same equipment, how much better do you think the image from Siding Springs would appear?

cheers
Martin