I had a similar experience with the D800 (at f5 under dark skies). 3200iso and 10 minutes was too much, and 5 minute subs were not as clean as earlier experiments at iso1000 and 10 minutes. Next time out I'm going to try a few subs at intermediate iso - since I can usually get the G11 setup to deliver 10 minute subs in failr short order with the PAS.
I've just been fiddling with the Nikon camera control pro, it also lets you use the liveview on the laptop and control the camera via usb cable. You'd think for what these cameras cost they'd throw a miserable 180bucks worth of software in!
cheers,
Andrew.
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