I am looking for a tripod that can handle the upfront type weight the 70-200 IS lens gives. My regular tripod does not seem to screw in to tight onto the lens clamp--it seems to slide a little. And with all that money out front i dont want to lose her. Now my monopod works just fine, but again looking for a " average size tripod-- possible need to use a good tripod head or tripod ball, to use with the canon 40D
thanks
please advise