In cinematography, a focus puller or first assistant camera (1st AC) is the member of a film crew responsible for keeping the camera's focus at the proper position during a shoot. This typically requires pulling the focus with a follow focus device during the take, to compensate for camera and/or subject movement. This requires intimate knowledge and experience with the optical principle of depth of field, which the 1st AC must learn to exploit to his or her advantage. In extreme circumstances the depth of field may sometimes be very small, as little as 1/4 or 1/8th of an inch (3-6 mm). Since 1st ACs do not look through the camera (that is the job of the camera operator) and thus cannot see the results of their focusing in real-time, this job is considered to be extremely technically difficult. To accurately focus on the subject, it is common to measure the distance (usually with a tape measure or, more recently, with electronic tape measures using lasers) between the camera and the subject before the take, done usually as as the rest of the film crew prepares for the shot.
Barry has served as a focus puller on feature films and many short films using traditional film stocks as well as digital photography utilising 35mm lens adaptors.
Confident in the operation of Moviecam 35mm, Arri 35 & 16mm , Sony 750/900 HD, Panasonic 400/900 HD & Red 1.
Barry also has experience with Digi Prime lenses.
From talking heads to live events & entertainment, Barry has experience lighting and using two third inch CCD DigiBeta to High Definition cameras as well as studio Triax cameras with pedestal, shotbox and capstan focus.