Getting ready to attempt a wildlife video during the upcoming Turkey season in April. Have tested lenses for the field of view & depth of field that I want to have at 25 yards. Looks like 85mm will get it done so I'll use my Canon 80-200/4.0L on the NEX-7. What I don't know yet is the range and sensitivity of the built-in NEX-7 mic to be able to pick up any turkey drumming / clucks / gobbles at that distance. I hear talk about plugging in an external mic. Any first hand experience / recommendations on built-in vs. external mics on the NEX-7 would be appreciated. Right now, this is what I'm planning to use.