Time stops for no-one.
Seriously, if you want to have a good handle on autoguiding, I highly recommend reading the attached document by Jim McMillian (the master mind behind multiguide). It will certainly boost your knowledge in this area if you're a little confused or want to know more such as S/N ratios for guiding, guidestar selection criteria and many other items. I use Jim's autoguiding methodologies through ACP.
Enjoy
