To install a BTSensor lens

Note: Only used on s250e and Slim 13E sensors.

1. Screw the lens onto the BTSensor with the included plastic lens tensioner between the M12 lens adapter and the lens itself. Tighten until proper focus is achieved.
2. Once you achieve the desired focus, hold the lens in place while you tighten down the lens tensioner.

Note: The s250e comes with a spring for the lens instead of a tensioner. No tightening is required for this lens.