Many thanks for the welcome and reply. Only just got the a6400 to be honest. Looking to get the Sigma 1.4 prime lens at some point. I will primarily be using it to film some things with, mainly interviews for a paranormal show I produce.Welcome Phil.
Its been a while since I've used that lens, but I do recall it having the typical electronic noise while zooming and focus hunting a bit in dimmer conditions. It's probably Sony's cheapest lens, and sadly you get what you pay for.
Any other lenses in your bag or plans to upgrade? What genres and conditions do you like to shoot?