Hi Doug just noticed a potential problem with the shutter on the integrated guider of the FW8G. It appears that shutter cannot keep pace with the exposures, particularly when the exposures are very fast i.e hundredths of a second (as I am using it with an AOX). I was tracking another problem when I started to take 0.09 focus exposures with the autoguider and every few frames, half image is black and then it moves off. AO was not working at this point, in fact, was disabled and centered. Can the shutter latency be adjusted? thanks Martin