Quote Originally Posted by Daniel Browning


The 180 macro is a good consideration too, but I've never used it. It gives you more working distance, which is critical especially for outdoors stuff, but without I.S. you might find that you can't stop down enough, even in sunlight. (For 1:1 at 180mm on a 7D, I'm pretty sure I would need at least 1/500 just to get a 25% keeper rate).

Great point Daniel, Thanks for pointing that out-- I haven't given the increased exposure requirements 1:1 shooting, much thought. In this case the IS on the 100 would definetly come in handy.---