Hi. I just bought a Sony 20mm f2.8 to use with the FS5 on a Movi. The 20mm doesn't want to autofocus at all and I am wondering if it is a faulty lens or is this a common problem? Also, when in manual focus it reports the wrong distance. This also happens on my FS7 but the autofocus is slightly better. Does anyone else have this FS5 / 20mm f2.8 combination, and if so, how is it working for you?