Adjusting quickly and precisely the source-image distance for a particular projection is important to achieve optimal image quality. That’s why this second laser integrated into the ceiling suspension’s collimator is extremely valuable, providing a simple and visual feedback to the technologist if the source-image distance is correct, without needing to measure the distance manually. The second laser complements the first one in the collimator, making two parallel laser lines visible on the table. Adjusting the tube up & down changes the distance between these lines and the correct source-image distance is achieved when both lines are overlapping and only one line is visible.