[JohnH]

I am struggling with autoguiding reliably and need help...I am doing something wrong I am sure.

I would be interested to hear advice around selecting guidestar magnitude/exposure - I have read that if the guidestar signal is SATURATED on the CCD you can get poor perfomance (clipping) so you must adjust exposure/gain to compensate, this may not be true for all centroid algorithms but certainly seems to upset Maxim EE this is made worse this $%^&ware selects the guidestar automatically form those in view (I think it picks the brightest! GRRR!). Is this correct?

Second is the rate of corrections to send to the mount 1s intervals seems to be a good start point and finally the slew speed - siderial or less, would you ever use more?

So much to learn and get right when you go beyond 30s at 1800mm...