Quote Originally Posted by Bombsight
So the 24-105 would be my best choice ..... with it being well under 100mm?

Experiment and you'll see what works best for you. I actually use extension tubes more often with 100mm and above. I've gotten a fair amount of use of them with my 70-200 (even at 200mm, enough so that I have so far resisted the 180mm macro )


Just remember that with a zoom, you'll often get more magnification as you zoom out (opposite of how it is without extension tubes). So with my 70-200 if I want to make a butterfly or whatever bigger and don't want to add more extension, I can zoom out and move closer.