We think the results are very respectable, with decent color contrast (filming was on a cloudy day) and no rollingshutter effect (which can often be a problem).
Red has just announced the Red Motion lens mounting system for Epic and Scarlet motion camera systems that'll eliminate one of their chief snags: the dreaded CMOS rollingshutter.
Topping the list for Movie Maker is video stabilization, which fixes camera jitter and "wobble" or rollingshutter -- a desperately needed feature for free software chockablock with shaky soccer mom and skater videos.
Though both pack 4K CMOS imagers, there are some major differences -- the higher-end PMW-F55 has a global shutter, wider color gamut and can capture 4k, 2k or HD video internally, while the PMW-F5 records 2k and HD natively with a rollingshutter (4k requires an optional RAW recorder, as discussed below).