What are people using for a 13x or greater zoom lens on the NEX-FS100 ? Will lenses made for 1/2" sensors be large enough, or do you need a 2/3" sensor size lens ?

I can't answer about the zoom. But I'm almost positive even a lens made for a 2/3 sensor will Not work with the S35 sensor.

The lens needs to work for an s35 sized sensor. That's bigger than 2/3".

b4->PL
PL->E

2+ stops loss tho
need a bridge plate or other support for the mount

d