Hi all,


I just got my spanking new EF 300mm f/4l is usm.


I often shoot birds and BIF and would like some advice with:





1) What shutter speeds/ISOs should I use on any given day?


2) What is the minimum shutter speed needed to stop action of a bird, say, catching a fish?


3) For BIF, I should use AI Servo, right?





I know some of those questions seem really stupid and basic, but, well, I am a beginner at this.


All help is very much appreciated.





thanks for your time and help!


brendan []