I'm shooting a music video on an SR3 soon with some superspeeds. I had a look through the viewfinder the other day, wide open at t 1.3 and I 'seemed' to be able to pick the focus fairly accurately. I don't want to eyeball the whole shoot however and get back soft rushes. Has anyone judged focus by eye and been ok? Or should I always be measuring? By the way, I'm not going to be shooting the clip at t1.3!