Control-L
Control-L , CTRL-L or LANC (for Logic Application Control Bus System or Local Application Control Bus System ) is a control protocol for video cameras and individual digital cameras that can be found on cameras from Sony , Canon and JVC .
It is a serial , bidirectional protocol that can be used to transfer data to and from the camera in order to send commands to the camera and request status information. The most common implementation of the connection is a 2.5 mm jack socket , which can be connected to a LANC remote control using a three-pole cable. In the past, a mini-DIN socket with 5 poles was used for this purpose (adapters exist and can be built by yourself). Individual compact video cameras also use other, complex connections (e.g. "AV Out" / "AV socket" on newer Sony camcorders), which in addition to LANC also have contacts for e.g. B. headphones , microphone contain video signals or a power connection, and must be used with an adapter (e.g. the adapter VMC-LM7 on the Sony DCR-PC7E). The connection is z. B. also called "mini A / V Remote" by Sony and has been standardized by Sony to a 10-pin round connector in recent years.
The LANC protocol is very extensive. It contains commands for:
- Zooming at different speeds
- Record on / off
- Switching video / photo function
- Auto focus on / off
- Adjust manual focus
- Backlight correction
- Playback functions of the VCR in cameras
- Camera battery status
- Status of the remaining tape length
Not all cameras support all functions.
Typical areas of application for LANC controls are rear camera controls (mostly mounted on the handle of the tripod tilt), underwater housings, remote control of cameras and synchronization of cameras, for example to record stereoscopically by triggering two cameras at exactly the same time .