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Varying exposure time at fixed ISO sensitivity

tISOImage extractProfileComments
0.3sISO
3200
With such a short exposure I should have used mirror lock-up (or shoot from live view) to avoid vibration effects being visible.
0.6sISO
3200
 
1.3sISO
3200
 
2.5sISO
3200
 
5sISO
3200
 
10sISO
3200
 
20sISO
3200
 
40sISO
3200
 
70sISO
3200
Jogged the telescope, but I kept this in to show the brightness still rising, to useless levels.

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