Da dreaded IIF play!

[thumpferee]

R1 and R2, 1 out. I'm PU. B1 hits 35-45 foot pop up towards 2nd base, runners take off. As the ball hits it's peak, I call "IIF, Batter's out"!

After the ball lands, I notice F4 took off toward 2b to cover and was no where near the ball to catch it. I know IFF should be called if it can be caught with ordinary effort, but considering the sitch, did I blow this one?

PS: I heard the O manager tell his players and parents that it was the correct call. He even went as far as to say "the rule is to protect the runners". I love that guy!

Thanks for your thoughts!