User Manual

Table Of Contents

2. Cooke

“Intelligent” Technology Overview

/I Technology is a registered trademark of Cooke Optics Limited. It is a metadata

protocol that enables film and digital cameras to automatically record key lens data for

every frame shot. Equipment identification is by serial number, lens type and

manufacturer. The I Technology system records lens settings and performs a series of

calculations to provide continuous remote readout of focal length, focusing distance,

aperture, zoom, depth of field, hyperfocal distance, horizontal field of view, entrance

pupil position, normalized zoom and frame rate in both metric and imperial units. The

information is digitally recorded for every frame and stored as metadata, accessible via

cable connector near the lens mount and/or contacts in the PL mount that sync with I

compatible cameras and other equipment.

2.1 /I Technology Open Protocol

/ The goal behind I Technology is to provide an open standard that will streamline

and enhance the process of filmmaking by making equipment digitally compatible from

production through post. Any product that displays the “I” logo, from acquisition

through post, is compatible with all other/I Technology embedded products. This

means an/I lens from Cooke can be used with any other products that conform to the

I Technology standards.

Within the I Technology Communication protocol standard, there are two types of

commands as shown in figure 1: CORE commands and EXTENDED commands. CORE

commands are used to communicate between different brands of equipment and are

supported by ALL/I Technology partners. The/I Technology protocol platform also

allows for brand specific commands known as EXTENDED commands. EXTENDED

commands are considered brand specific and are not supported by all lenses, cameras

or I Technology partners. Users should rely on the CORE command set.

EXTENDED command sets may include unique brand specific commands used for

tasks such as calibration, software updates, or communication between brand specific

equipment. EXTENDED commands should be considered hidden commands not used by

a typical operator. A list of some EXTENDED commands is available by request to

technicians who service equipment and I Technology developers.