Auto Exposure > 5 sec?

[StarFlea]

Hello!

I’ve tried a few times now to capture an all-night time-lapse using my fisheye lens (via the sequencer), taking a shot every 15 seconds. I’m using auto-exposure for this.
Generally, it works quite well; however, I’ve noticed that the exposure time never seems to exceed 5 seconds, even though the profile file specifies 15 seconds.

My goal is to capture the Milky Way, but that’s likely to be difficult with exposure times of only 5 seconds. It would also be ideal if the exposure time could be reduced—for instance, when the moon rises.

Regards,
StarFlea