Hi Everyone,


I'm debating between these two lenses for nature photography, some wildlife, and perhaps a bird or two although that last is not my main interest. I've got excellent primes at the lower end of the 100-400 zoom range (EF 100mm f/2.8<span style="color: red;"]LMacro IS USM and EF 200mm f/2.8<span style="color: red;"]LII USM).


I'm being somewhat opportunistic here, since I currently have the opportunity to pick up a used but in like-new conditionEF 100-400mm for a fair bit less than the cost of a newEF 300mm f/4L. However, I'm not in a huge rush here, so if I miss that opportunity, I'll survive. [] But I'll still have this decision to make...


Thoughts and input will be appreciated!


Thanks,


--John