The discussion centers on creating a device that allows viewing a display from a few centimeters away, emphasizing the concept of "eye relief" in geometrical optics. Participants suggest using a cellphone camera to capture the display image and propose constructing a holder for this purpose. The conversation highlights the need for two lenses within a tube: one to capture the rangefinder image and send parallel rays, and another to refocus those rays for viewing. The importance of lens focal lengths is discussed, with a distinction made between telescopes and image relay systems based on the arrangement of these lenses. The dialogue acknowledges the complexities of optics, suggesting that a simple tube won't suffice for the desired functionality.