Adrian, I've used that exact setup and a better beamer to stop hummingbirds' wings and other situations....but, IMHO,the lighting istoo artificial; unnatural.


Again, from my perspective; a great wildlife shot is done in natural light, but I'm sure there will be more than a few members that will disagree w/me.


So remember, there's more than 1 way to skin a cat....hope this expression doesn't break the PC barrier in today's world. []


BTW...I've just upgraded my 40D to a 7D and it hasimproved the 100-400's ability in low light captures.


Regards


Bill