Hey everyone!
First post here and looking forward to getting involved!
I'm in a similar situation as Joseph and was also wondering about the Canon EF 100-400mm f/4.5-5.6 L IS USM; @Mike: you said you'd recommend that over the 400mm L for more keepers.... could you or anyone with experience on these lenses elaborate on the differences between zoom- and prime- lens in this comparison? From what I've read so far the 400m is sharper than the 100-400?
Thanks a lot in advance, and good luck searching Joseph
Best birding-wishes,
Vincent