User Manual

Table Of Contents

external interface or both. This data can then be stored by the camera or external

device for post processing. 5I lenses have the additional facility to collect a data

stream from an External Data Source Unit (EDSU) and then append this data to the

normally generated data string of the lens. This combined data string is then sent to the

camera. At the same time that the EDSU is sending data to the lens, it can also request

that the lens send the normal data stream back to it.

The commands and instructions for using this facility are described in Section 9.

4.7 /I Lens Types – CORE Commands and EXTENDED Commands

Within the/I Technology Communication protocol standards, there are two types

of commands: CORE commands and EXTENDED commands. CORE commands are used

to communicate between different brands of equipment and are supported by all/I

Technology partners. Any equipment from a manufacturer who adopts the/I

Technology protocols and agrees to implement all /I CORE commands, can

communicate directly with any I lens. An I lens accepts specific commands that

control the data output, including a continuous mode that can send a constantly

updated data stream at up to 285 frames per second. This data can be eembedded as

metadata. For cameras with I capability, the data can be stored as metadata with the

picture.

The I Technology open 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.

When each lens is built, a careful process is undertaken to ensure each individual

sensor is calibrated so that the resistance elements map correctly to their respective

optical ring markings. This information is stored in the electronics board along with

other unique lens characteristics. There is a set of EXTENDED commands, unique to

Cooke lenses, used for this purpose only. These hidden commands are considered

confidential.

In addition to the set of EXTENDED commands associated with calibrating a lens,

there is also a set of EXTENDED commands associated with lens program updates. These

commands are confidential.

4.7.1 PANCHROI Prime Lenses T2.8

PanchroI Prime lenses have a single channel interface for direct communication

with a camera. The start-up baud rate will be 115k2 if an N command is received within

one second. If no N command is received within one second, the speed will drop to